diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 21:35:28 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-07-31 21:35:28 (GMT) |
commit | cc8362b1f6d724e46f515121d442779924b19fec (patch) | |
tree | 86fb5c3767e538ec9ded57dd7b3ce5d69dcde691 | |
parent | 2e3ee613480563a6d5c01b57d342e65cc58c06df (diff) | |
parent | 1fe5e9932156f6122c3b1ff6ba7541c27c86718c (diff) | |
download | linux-fsl-qoriq-cc8362b1f6d724e46f515121d442779924b19fec.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
Pull Ceph changes from Sage Weil:
"Lots of stuff this time around:
- lots of cleanup and refactoring in the libceph messenger code, and
many hard to hit races and bugs closed as a result.
- lots of cleanup and refactoring in the rbd code from Alex Elder,
mostly in preparation for the layering functionality that will be
coming in 3.7.
- some misc rbd cleanups from Josh Durgin that are finally going
upstream
- support for CRUSH tunables (used by newer clusters to improve the
data placement)
- some cleanup in our use of d_parent that Al brought up a while back
- a random collection of fixes across the tree
There is another patch coming that fixes up our ->atomic_open()
behavior, but I'm going to hammer on it a bit more before sending it."
Fix up conflicts due to commits that were already committed earlier in
drivers/block/rbd.c, net/ceph/{messenger.c, osd_client.c}
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (132 commits)
rbd: create rbd_refresh_helper()
rbd: return obj version in __rbd_refresh_header()
rbd: fixes in rbd_header_from_disk()
rbd: always pass ops array to rbd_req_sync_op()
rbd: pass null version pointer in add_snap()
rbd: make rbd_create_rw_ops() return a pointer
rbd: have __rbd_add_snap_dev() return a pointer
libceph: recheck con state after allocating incoming message
libceph: change ceph_con_in_msg_alloc convention to be less weird
libceph: avoid dropping con mutex before fault
libceph: verify state after retaking con lock after dispatch
libceph: revoke mon_client messages on session restart
libceph: fix handling of immediate socket connect failure
ceph: update MAINTAINERS file
libceph: be less chatty about stray replies
libceph: clear all flags on con_close
libceph: clean up con flags
libceph: replace connection state bits with states
libceph: drop unnecessary CLOSED check in socket state change callback
libceph: close socket directly from ceph_con_close()
...
-rw-r--r-- | Documentation/ABI/testing/sysfs-bus-rbd | 10 | ||||
-rw-r--r-- | MAINTAINERS | 13 | ||||
-rw-r--r-- | drivers/block/rbd.c | 816 | ||||
-rw-r--r-- | drivers/block/rbd_types.h | 1 | ||||
-rw-r--r-- | fs/ceph/dir.c | 7 | ||||
-rw-r--r-- | fs/ceph/mds_client.c | 23 | ||||
-rw-r--r-- | fs/ceph/snap.c | 18 | ||||
-rw-r--r-- | fs/ceph/super.c | 1 | ||||
-rw-r--r-- | fs/ceph/super.h | 4 | ||||
-rw-r--r-- | fs/ceph/xattr.c | 1 | ||||
-rw-r--r-- | include/linux/ceph/ceph_features.h | 27 | ||||
-rw-r--r-- | include/linux/ceph/ceph_fs.h | 14 | ||||
-rw-r--r-- | include/linux/ceph/decode.h | 49 | ||||
-rw-r--r-- | include/linux/ceph/libceph.h | 10 | ||||
-rw-r--r-- | include/linux/ceph/messenger.h | 60 | ||||
-rw-r--r-- | include/linux/ceph/mon_client.h | 2 | ||||
-rw-r--r-- | include/linux/ceph/msgpool.h | 3 | ||||
-rw-r--r-- | include/linux/crush/crush.h | 8 | ||||
-rw-r--r-- | net/ceph/ceph_common.c | 25 | ||||
-rw-r--r-- | net/ceph/crush/mapper.c | 13 | ||||
-rw-r--r-- | net/ceph/messenger.c | 925 | ||||
-rw-r--r-- | net/ceph/mon_client.c | 76 | ||||
-rw-r--r-- | net/ceph/msgpool.c | 7 | ||||
-rw-r--r-- | net/ceph/osd_client.c | 77 | ||||
-rw-r--r-- | net/ceph/osdmap.c | 59 |
25 files changed, 1351 insertions, 898 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-rbd b/Documentation/ABI/testing/sysfs-bus-rbd index bcd88eb..3c17b62 100644 --- a/Documentation/ABI/testing/sysfs-bus-rbd +++ b/Documentation/ABI/testing/sysfs-bus-rbd @@ -35,8 +35,14 @@ name pool - The pool where this rbd image resides. The pool-name pair is unique - per rados system. + The name of the storage pool where this rbd image resides. + An rbd image name is unique within its pool. + +pool_id + + The unique identifier for the rbd image's pool. This is + a permanent attribute of the pool. A pool's id will never + change. size diff --git a/MAINTAINERS b/MAINTAINERS index fb036a0..5b44872 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1789,15 +1789,16 @@ F: arch/powerpc/oprofile/*cell* F: arch/powerpc/platforms/cell/ CEPH DISTRIBUTED FILE SYSTEM CLIENT -M: Sage Weil <sage@newdream.net> +M: Sage Weil <sage@inktank.com> L: ceph-devel@vger.kernel.org -W: http://ceph.newdream.net/ +W: http://ceph.com/ T: git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git S: Supported F: Documentation/filesystems/ceph.txt F: fs/ceph F: net/ceph F: include/linux/ceph +F: include/linux/crush CERTIFIED WIRELESS USB (WUSB) SUBSYSTEM: L: linux-usb@vger.kernel.org @@ -5639,10 +5640,12 @@ S: Supported F: arch/hexagon/ RADOS BLOCK DEVICE (RBD) -F: include/linux/qnxtypes.h -M: Yehuda Sadeh <yehuda@hq.newdream.net> -M: Sage Weil <sage@newdream.net> +M: Yehuda Sadeh <yehuda@inktank.com> +M: Sage Weil <sage@inktank.com> +M: Alex Elder <elder@inktank.com> M: ceph-devel@vger.kernel.org +W: http://ceph.com/ +T: git git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client.git S: Supported F: drivers/block/rbd.c F: drivers/block/rbd_types.h diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 8f428a8..9917943 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -55,8 +55,6 @@ #define RBD_MINORS_PER_MAJOR 256 /* max minors per blkdev */ -#define RBD_MAX_MD_NAME_LEN (RBD_MAX_OBJ_NAME_LEN + sizeof(RBD_SUFFIX)) -#define RBD_MAX_POOL_NAME_LEN 64 #define RBD_MAX_SNAP_NAME_LEN 32 #define RBD_MAX_OPT_LEN 1024 @@ -78,13 +76,12 @@ */ struct rbd_image_header { u64 image_size; - char block_name[32]; + char *object_prefix; __u8 obj_order; __u8 crypt_type; __u8 comp_type; struct ceph_snap_context *snapc; size_t snap_names_len; - u64 snap_seq; u32 total_snaps; char *snap_names; @@ -150,7 +147,7 @@ struct rbd_snap { * a single device */ struct rbd_device { - int id; /* blkdev unique id */ + int dev_id; /* blkdev unique id */ int major; /* blkdev assigned major */ struct gendisk *disk; /* blkdev's gendisk and rq */ @@ -163,20 +160,24 @@ struct rbd_device { spinlock_t lock; /* queue lock */ struct rbd_image_header header; - char obj[RBD_MAX_OBJ_NAME_LEN]; /* rbd image name */ - int obj_len; - char obj_md_name[RBD_MAX_MD_NAME_LEN]; /* hdr nm. */ - char pool_name[RBD_MAX_POOL_NAME_LEN]; - int poolid; + char *image_name; + size_t image_name_len; + char *header_name; + char *pool_name; + int pool_id; struct ceph_osd_event *watch_event; struct ceph_osd_request *watch_request; /* protects updating the header */ struct rw_semaphore header_rwsem; - char snap_name[RBD_MAX_SNAP_NAME_LEN]; + /* name of the snapshot this device reads from */ + char *snap_name; + /* id of the snapshot this device reads from */ u64 snap_id; /* current snapshot id */ - int read_only; + /* whether the snap_id this device reads from still exists */ + bool snap_exists; + int read_only; struct list_head node; @@ -201,8 +202,7 @@ static ssize_t rbd_snap_add(struct device *dev, struct device_attribute *attr, const char *buf, size_t count); -static void __rbd_remove_snap_dev(struct rbd_device *rbd_dev, - struct rbd_snap *snap); +static void __rbd_remove_snap_dev(struct rbd_snap *snap); static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count); @@ -240,7 +240,7 @@ static void rbd_put_dev(struct rbd_device *rbd_dev) put_device(&rbd_dev->dev); } -static int __rbd_refresh_header(struct rbd_device *rbd_dev); +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver); static int rbd_open(struct block_device *bdev, fmode_t mode) { @@ -273,9 +273,9 @@ static const struct block_device_operations rbd_bd_ops = { /* * Initialize an rbd client instance. - * We own *opt. + * We own *ceph_opts. */ -static struct rbd_client *rbd_client_create(struct ceph_options *opt, +static struct rbd_client *rbd_client_create(struct ceph_options *ceph_opts, struct rbd_options *rbd_opts) { struct rbd_client *rbdc; @@ -291,10 +291,10 @@ static struct rbd_client *rbd_client_create(struct ceph_options *opt, mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rbdc->client = ceph_create_client(opt, rbdc, 0, 0); + rbdc->client = ceph_create_client(ceph_opts, rbdc, 0, 0); if (IS_ERR(rbdc->client)) goto out_mutex; - opt = NULL; /* Now rbdc->client is responsible for opt */ + ceph_opts = NULL; /* Now rbdc->client is responsible for ceph_opts */ ret = ceph_open_session(rbdc->client); if (ret < 0) @@ -317,23 +317,23 @@ out_mutex: mutex_unlock(&ctl_mutex); kfree(rbdc); out_opt: - if (opt) - ceph_destroy_options(opt); + if (ceph_opts) + ceph_destroy_options(ceph_opts); return ERR_PTR(ret); } /* * Find a ceph client with specific addr and configuration. */ -static struct rbd_client *__rbd_client_find(struct ceph_options *opt) +static struct rbd_client *__rbd_client_find(struct ceph_options *ceph_opts) { struct rbd_client *client_node; - if (opt->flags & CEPH_OPT_NOSHARE) + if (ceph_opts->flags & CEPH_OPT_NOSHARE) return NULL; list_for_each_entry(client_node, &rbd_client_list, node) - if (ceph_compare_options(opt, client_node->client) == 0) + if (!ceph_compare_options(ceph_opts, client_node->client)) return client_node; return NULL; } @@ -349,7 +349,7 @@ enum { /* string args above */ }; -static match_table_t rbdopt_tokens = { +static match_table_t rbd_opts_tokens = { {Opt_notify_timeout, "notify_timeout=%d"}, /* int args above */ /* string args above */ @@ -358,11 +358,11 @@ static match_table_t rbdopt_tokens = { static int parse_rbd_opts_token(char *c, void *private) { - struct rbd_options *rbdopt = private; + struct rbd_options *rbd_opts = private; substring_t argstr[MAX_OPT_ARGS]; int token, intval, ret; - token = match_token(c, rbdopt_tokens, argstr); + token = match_token(c, rbd_opts_tokens, argstr); if (token < 0) return -EINVAL; @@ -383,7 +383,7 @@ static int parse_rbd_opts_token(char *c, void *private) switch (token) { case Opt_notify_timeout: - rbdopt->notify_timeout = intval; + rbd_opts->notify_timeout = intval; break; default: BUG_ON(token); @@ -400,7 +400,7 @@ static struct rbd_client *rbd_get_client(const char *mon_addr, char *options) { struct rbd_client *rbdc; - struct ceph_options *opt; + struct ceph_options *ceph_opts; struct rbd_options *rbd_opts; rbd_opts = kzalloc(sizeof(*rbd_opts), GFP_KERNEL); @@ -409,29 +409,29 @@ static struct rbd_client *rbd_get_client(const char *mon_addr, rbd_opts->notify_timeout = RBD_NOTIFY_TIMEOUT_DEFAULT; - opt = ceph_parse_options(options, mon_addr, - mon_addr + mon_addr_len, - parse_rbd_opts_token, rbd_opts); - if (IS_ERR(opt)) { + ceph_opts = ceph_parse_options(options, mon_addr, + mon_addr + mon_addr_len, + parse_rbd_opts_token, rbd_opts); + if (IS_ERR(ceph_opts)) { kfree(rbd_opts); - return ERR_CAST(opt); + return ERR_CAST(ceph_opts); } spin_lock(&rbd_client_list_lock); - rbdc = __rbd_client_find(opt); + rbdc = __rbd_client_find(ceph_opts); if (rbdc) { /* using an existing client */ kref_get(&rbdc->kref); spin_unlock(&rbd_client_list_lock); - ceph_destroy_options(opt); + ceph_destroy_options(ceph_opts); kfree(rbd_opts); return rbdc; } spin_unlock(&rbd_client_list_lock); - rbdc = rbd_client_create(opt, rbd_opts); + rbdc = rbd_client_create(ceph_opts, rbd_opts); if (IS_ERR(rbdc)) kfree(rbd_opts); @@ -480,46 +480,60 @@ static void rbd_coll_release(struct kref *kref) kfree(coll); } +static bool rbd_dev_ondisk_valid(struct rbd_image_header_ondisk *ondisk) +{ + return !memcmp(&ondisk->text, + RBD_HEADER_TEXT, sizeof (RBD_HEADER_TEXT)); +} + /* * Create a new header structure, translate header format from the on-disk * header. */ static int rbd_header_from_disk(struct rbd_image_header *header, struct rbd_image_header_ondisk *ondisk, - u32 allocated_snaps, - gfp_t gfp_flags) + u32 allocated_snaps) { - u32 i, snap_count; + u32 snap_count; - if (memcmp(ondisk, RBD_HEADER_TEXT, sizeof(RBD_HEADER_TEXT))) + if (!rbd_dev_ondisk_valid(ondisk)) return -ENXIO; snap_count = le32_to_cpu(ondisk->snap_count); - if (snap_count > (UINT_MAX - sizeof(struct ceph_snap_context)) - / sizeof (*ondisk)) + if (snap_count > (SIZE_MAX - sizeof(struct ceph_snap_context)) + / sizeof (u64)) return -EINVAL; header->snapc = kmalloc(sizeof(struct ceph_snap_context) + snap_count * sizeof(u64), - gfp_flags); + GFP_KERNEL); if (!header->snapc) return -ENOMEM; - header->snap_names_len = le64_to_cpu(ondisk->snap_names_len); if (snap_count) { + header->snap_names_len = le64_to_cpu(ondisk->snap_names_len); header->snap_names = kmalloc(header->snap_names_len, - gfp_flags); + GFP_KERNEL); if (!header->snap_names) goto err_snapc; header->snap_sizes = kmalloc(snap_count * sizeof(u64), - gfp_flags); + GFP_KERNEL); if (!header->snap_sizes) goto err_names; } else { + WARN_ON(ondisk->snap_names_len); + header->snap_names_len = 0; header->snap_names = NULL; header->snap_sizes = NULL; } - memcpy(header->block_name, ondisk->block_name, + + header->object_prefix = kmalloc(sizeof (ondisk->block_name) + 1, + GFP_KERNEL); + if (!header->object_prefix) + goto err_sizes; + + memcpy(header->object_prefix, ondisk->block_name, sizeof(ondisk->block_name)); + header->object_prefix[sizeof (ondisk->block_name)] = '\0'; header->image_size = le64_to_cpu(ondisk->image_size); header->obj_order = ondisk->options.order; @@ -527,11 +541,13 @@ static int rbd_header_from_disk(struct rbd_image_header *header, header->comp_type = ondisk->options.comp_type; atomic_set(&header->snapc->nref, 1); - header->snap_seq = le64_to_cpu(ondisk->snap_seq); + header->snapc->seq = le64_to_cpu(ondisk->snap_seq); header->snapc->num_snaps = snap_count; header->total_snaps = snap_count; if (snap_count && allocated_snaps == snap_count) { + int i; + for (i = 0; i < snap_count; i++) { header->snapc->snaps[i] = le64_to_cpu(ondisk->snaps[i].id); @@ -540,16 +556,22 @@ static int rbd_header_from_disk(struct rbd_image_header *header, } /* copy snapshot names */ - memcpy(header->snap_names, &ondisk->snaps[i], + memcpy(header->snap_names, &ondisk->snaps[snap_count], header->snap_names_len); } return 0; +err_sizes: + kfree(header->snap_sizes); + header->snap_sizes = NULL; err_names: kfree(header->snap_names); + header->snap_names = NULL; err_snapc: kfree(header->snapc); + header->snapc = NULL; + return -ENOMEM; } @@ -575,52 +597,50 @@ static int snap_by_name(struct rbd_image_header *header, const char *snap_name, return -ENOENT; } -static int rbd_header_set_snap(struct rbd_device *dev, u64 *size) +static int rbd_header_set_snap(struct rbd_device *rbd_dev, u64 *size) { - struct rbd_image_header *header = &dev->header; - struct ceph_snap_context *snapc = header->snapc; - int ret = -ENOENT; - - BUILD_BUG_ON(sizeof (dev->snap_name) < sizeof (RBD_SNAP_HEAD_NAME)); + int ret; - down_write(&dev->header_rwsem); + down_write(&rbd_dev->header_rwsem); - if (!memcmp(dev->snap_name, RBD_SNAP_HEAD_NAME, + if (!memcmp(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME))) { - if (header->total_snaps) - snapc->seq = header->snap_seq; - else - snapc->seq = 0; - dev->snap_id = CEPH_NOSNAP; - dev->read_only = 0; + rbd_dev->snap_id = CEPH_NOSNAP; + rbd_dev->snap_exists = false; + rbd_dev->read_only = 0; if (size) - *size = header->image_size; + *size = rbd_dev->header.image_size; } else { - ret = snap_by_name(header, dev->snap_name, &snapc->seq, size); + u64 snap_id = 0; + + ret = snap_by_name(&rbd_dev->header, rbd_dev->snap_name, + &snap_id, size); if (ret < 0) goto done; - dev->snap_id = snapc->seq; - dev->read_only = 1; + rbd_dev->snap_id = snap_id; + rbd_dev->snap_exists = true; + rbd_dev->read_only = 1; } ret = 0; done: - up_write(&dev->header_rwsem); + up_write(&rbd_dev->header_rwsem); return ret; } static void rbd_header_free(struct rbd_image_header *header) { - kfree(header->snapc); - kfree(header->snap_names); + kfree(header->object_prefix); kfree(header->snap_sizes); + kfree(header->snap_names); + ceph_put_snap_context(header->snapc); } /* * get the actual striped segment name, offset and length */ static u64 rbd_get_segment(struct rbd_image_header *header, - const char *block_name, + const char *object_prefix, u64 ofs, u64 len, char *seg_name, u64 *segofs) { @@ -628,7 +648,7 @@ static u64 rbd_get_segment(struct rbd_image_header *header, if (seg_name) snprintf(seg_name, RBD_MAX_SEG_NAME_LEN, - "%s.%012llx", block_name, seg); + "%s.%012llx", object_prefix, seg); ofs = ofs & ((1 << header->obj_order) - 1); len = min_t(u64, len, (1 << header->obj_order) - ofs); @@ -726,9 +746,8 @@ static struct bio *bio_chain_clone(struct bio **old, struct bio **next, * split_bio will BUG_ON if this is not the case */ dout("bio_chain_clone split! total=%d remaining=%d" - "bi_size=%d\n", - (int)total, (int)len-total, - (int)old_chain->bi_size); + "bi_size=%u\n", + total, len - total, old_chain->bi_size); /* split the bio. We'll release it either in the next call, or it will have to be released outside */ @@ -777,22 +796,24 @@ err_out: /* * helpers for osd request op vectors. */ -static int rbd_create_rw_ops(struct ceph_osd_req_op **ops, - int num_ops, - int opcode, - u32 payload_len) -{ - *ops = kzalloc(sizeof(struct ceph_osd_req_op) * (num_ops + 1), - GFP_NOIO); - if (!*ops) - return -ENOMEM; - (*ops)[0].op = opcode; +static struct ceph_osd_req_op *rbd_create_rw_ops(int num_ops, + int opcode, u32 payload_len) +{ + struct ceph_osd_req_op *ops; + + ops = kzalloc(sizeof (*ops) * (num_ops + 1), GFP_NOIO); + if (!ops) + return NULL; + + ops[0].op = opcode; + /* * op extent offset and length will be set later on * in calc_raw_layout() */ - (*ops)[0].payload_len = payload_len; - return 0; + ops[0].payload_len = payload_len; + + return ops; } static void rbd_destroy_ops(struct ceph_osd_req_op *ops) @@ -808,8 +829,8 @@ static void rbd_coll_end_req_index(struct request *rq, struct request_queue *q; int min, max, i; - dout("rbd_coll_end_req_index %p index %d ret %d len %lld\n", - coll, index, ret, len); + dout("rbd_coll_end_req_index %p index %d ret %d len %llu\n", + coll, index, ret, (unsigned long long) len); if (!rq) return; @@ -848,16 +869,15 @@ static void rbd_coll_end_req(struct rbd_request *req, * Send ceph osd request */ static int rbd_do_request(struct request *rq, - struct rbd_device *dev, + struct rbd_device *rbd_dev, struct ceph_snap_context *snapc, u64 snapid, - const char *obj, u64 ofs, u64 len, + const char *object_name, u64 ofs, u64 len, struct bio *bio, struct page **pages, int num_pages, int flags, struct ceph_osd_req_op *ops, - int num_reply, struct rbd_req_coll *coll, int coll_index, void (*rbd_cb)(struct ceph_osd_request *req, @@ -887,15 +907,13 @@ static int rbd_do_request(struct request *rq, req_data->coll_index = coll_index; } - dout("rbd_do_request obj=%s ofs=%lld len=%lld\n", obj, len, ofs); - - down_read(&dev->header_rwsem); + dout("rbd_do_request object_name=%s ofs=%llu len=%llu\n", object_name, + (unsigned long long) ofs, (unsigned long long) len); - osdc = &dev->rbd_client->client->osdc; + osdc = &rbd_dev->rbd_client->client->osdc; req = ceph_osdc_alloc_request(osdc, flags, snapc, ops, false, GFP_NOIO, pages, bio); if (!req) { - up_read(&dev->header_rwsem); ret = -ENOMEM; goto done_pages; } @@ -912,7 +930,7 @@ static int rbd_do_request(struct request *rq, reqhead = req->r_request->front.iov_base; reqhead->snapid = cpu_to_le64(CEPH_NOSNAP); - strncpy(req->r_oid, obj, sizeof(req->r_oid)); + strncpy(req->r_oid, object_name, sizeof(req->r_oid)); req->r_oid_len = strlen(req->r_oid); layout = &req->r_file_layout; @@ -920,7 +938,7 @@ static int rbd_do_request(struct request *rq, layout->fl_stripe_unit = cpu_to_le32(1 << RBD_MAX_OBJ_ORDER); layout->fl_stripe_count = cpu_to_le32(1); layout->fl_object_size = cpu_to_le32(1 << RBD_MAX_OBJ_ORDER); - layout->fl_pg_pool = cpu_to_le32(dev->poolid); + layout->fl_pg_pool = cpu_to_le32(rbd_dev->pool_id); ceph_calc_raw_layout(osdc, layout, snapid, ofs, &len, &bno, req, ops); @@ -929,7 +947,6 @@ static int rbd_do_request(struct request *rq, snapc, &mtime, req->r_oid, req->r_oid_len); - up_read(&dev->header_rwsem); if (linger_req) { ceph_osdc_set_request_linger(osdc, req); @@ -944,8 +961,9 @@ static int rbd_do_request(struct request *rq, ret = ceph_osdc_wait_request(osdc, req); if (ver) *ver = le64_to_cpu(req->r_reassert_version.version); - dout("reassert_ver=%lld\n", - le64_to_cpu(req->r_reassert_version.version)); + dout("reassert_ver=%llu\n", + (unsigned long long) + le64_to_cpu(req->r_reassert_version.version)); ceph_osdc_put_request(req); } return ret; @@ -979,7 +997,8 @@ static void rbd_req_cb(struct ceph_osd_request *req, struct ceph_msg *msg) bytes = le64_to_cpu(op->extent.length); read_op = (le16_to_cpu(op->op) == CEPH_OSD_OP_READ); - dout("rbd_req_cb bytes=%lld readop=%d rc=%d\n", bytes, read_op, rc); + dout("rbd_req_cb bytes=%llu readop=%d rc=%d\n", + (unsigned long long) bytes, read_op, (int) rc); if (rc == -ENOENT && read_op) { zero_bio_chain(req_data->bio, 0); @@ -1006,14 +1025,12 @@ static void rbd_simple_req_cb(struct ceph_osd_request *req, struct ceph_msg *msg /* * Do a synchronous ceph osd operation */ -static int rbd_req_sync_op(struct rbd_device *dev, +static int rbd_req_sync_op(struct rbd_device *rbd_dev, struct ceph_snap_context *snapc, u64 snapid, - int opcode, int flags, - struct ceph_osd_req_op *orig_ops, - int num_reply, - const char *obj, + struct ceph_osd_req_op *ops, + const char *object_name, u64 ofs, u64 len, char *buf, struct ceph_osd_request **linger_req, @@ -1022,45 +1039,28 @@ static int rbd_req_sync_op(struct rbd_device *dev, int ret; struct page **pages; int num_pages; - struct ceph_osd_req_op *ops = orig_ops; - u32 payload_len; + + BUG_ON(ops == NULL); num_pages = calc_pages_for(ofs , len); pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); if (IS_ERR(pages)) return PTR_ERR(pages); - if (!orig_ops) { - payload_len = (flags & CEPH_OSD_FLAG_WRITE ? len : 0); - ret = rbd_create_rw_ops(&ops, 1, opcode, payload_len); - if (ret < 0) - goto done; - - if ((flags & CEPH_OSD_FLAG_WRITE) && buf) { - ret = ceph_copy_to_page_vector(pages, buf, ofs, len); - if (ret < 0) - goto done_ops; - } - } - - ret = rbd_do_request(NULL, dev, snapc, snapid, - obj, ofs, len, NULL, + ret = rbd_do_request(NULL, rbd_dev, snapc, snapid, + object_name, ofs, len, NULL, pages, num_pages, flags, ops, - 2, NULL, 0, NULL, linger_req, ver); if (ret < 0) - goto done_ops; + goto done; if ((flags & CEPH_OSD_FLAG_READ) && buf) ret = ceph_copy_from_page_vector(pages, buf, ofs, ret); -done_ops: - if (!orig_ops) - rbd_destroy_ops(ops); done: ceph_release_page_vector(pages, num_pages); return ret; @@ -1070,10 +1070,10 @@ done: * Do an asynchronous ceph osd operation */ static int rbd_do_op(struct request *rq, - struct rbd_device *rbd_dev , + struct rbd_device *rbd_dev, struct ceph_snap_context *snapc, u64 snapid, - int opcode, int flags, int num_reply, + int opcode, int flags, u64 ofs, u64 len, struct bio *bio, struct rbd_req_coll *coll, @@ -1091,14 +1091,15 @@ static int rbd_do_op(struct request *rq, return -ENOMEM; seg_len = rbd_get_segment(&rbd_dev->header, - rbd_dev->header.block_name, + rbd_dev->header.object_prefix, ofs, len, seg_name, &seg_ofs); payload_len = (flags & CEPH_OSD_FLAG_WRITE ? seg_len : 0); - ret = rbd_create_rw_ops(&ops, 1, opcode, payload_len); - if (ret < 0) + ret = -ENOMEM; + ops = rbd_create_rw_ops(1, opcode, payload_len); + if (!ops) goto done; /* we've taken care of segment sizes earlier when we @@ -1112,7 +1113,6 @@ static int rbd_do_op(struct request *rq, NULL, 0, flags, ops, - num_reply, coll, coll_index, rbd_req_cb, 0, NULL); @@ -1136,7 +1136,6 @@ static int rbd_req_write(struct request *rq, return rbd_do_op(rq, rbd_dev, snapc, CEPH_NOSNAP, CEPH_OSD_OP_WRITE, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, - 2, ofs, len, bio, coll, coll_index); } @@ -1155,55 +1154,58 @@ static int rbd_req_read(struct request *rq, snapid, CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, - 2, ofs, len, bio, coll, coll_index); } /* * Request sync osd read */ -static int rbd_req_sync_read(struct rbd_device *dev, - struct ceph_snap_context *snapc, +static int rbd_req_sync_read(struct rbd_device *rbd_dev, u64 snapid, - const char *obj, + const char *object_name, u64 ofs, u64 len, char *buf, u64 *ver) { - return rbd_req_sync_op(dev, NULL, + struct ceph_osd_req_op *ops; + int ret; + + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_READ, 0); + if (!ops) + return -ENOMEM; + + ret = rbd_req_sync_op(rbd_dev, NULL, snapid, - CEPH_OSD_OP_READ, CEPH_OSD_FLAG_READ, - NULL, - 1, obj, ofs, len, buf, NULL, ver); + ops, object_name, ofs, len, buf, NULL, ver); + rbd_destroy_ops(ops); + + return ret; } /* * Request sync osd watch */ -static int rbd_req_sync_notify_ack(struct rbd_device *dev, +static int rbd_req_sync_notify_ack(struct rbd_device *rbd_dev, u64 ver, - u64 notify_id, - const char *obj) + u64 notify_id) { struct ceph_osd_req_op *ops; - struct page **pages = NULL; int ret; - ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_NOTIFY_ACK, 0); - if (ret < 0) - return ret; + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_NOTIFY_ACK, 0); + if (!ops) + return -ENOMEM; - ops[0].watch.ver = cpu_to_le64(dev->header.obj_version); + ops[0].watch.ver = cpu_to_le64(ver); ops[0].watch.cookie = notify_id; ops[0].watch.flag = 0; - ret = rbd_do_request(NULL, dev, NULL, CEPH_NOSNAP, - obj, 0, 0, NULL, - pages, 0, + ret = rbd_do_request(NULL, rbd_dev, NULL, CEPH_NOSNAP, + rbd_dev->header_name, 0, 0, NULL, + NULL, 0, CEPH_OSD_FLAG_READ, ops, - 1, NULL, 0, rbd_simple_req_cb, 0, NULL); @@ -1213,54 +1215,53 @@ static int rbd_req_sync_notify_ack(struct rbd_device *dev, static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data) { - struct rbd_device *dev = (struct rbd_device *)data; + struct rbd_device *rbd_dev = (struct rbd_device *)data; + u64 hver; int rc; - if (!dev) + if (!rbd_dev) return; - dout("rbd_watch_cb %s notify_id=%lld opcode=%d\n", dev->obj_md_name, - notify_id, (int)opcode); - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(dev); - mutex_unlock(&ctl_mutex); + dout("rbd_watch_cb %s notify_id=%llu opcode=%u\n", + rbd_dev->header_name, (unsigned long long) notify_id, + (unsigned int) opcode); + rc = rbd_refresh_header(rbd_dev, &hver); if (rc) pr_warning(RBD_DRV_NAME "%d got notification but failed to " - " update snaps: %d\n", dev->major, rc); + " update snaps: %d\n", rbd_dev->major, rc); - rbd_req_sync_notify_ack(dev, ver, notify_id, dev->obj_md_name); + rbd_req_sync_notify_ack(rbd_dev, hver, notify_id); } /* * Request sync osd watch */ -static int rbd_req_sync_watch(struct rbd_device *dev, - const char *obj, - u64 ver) +static int rbd_req_sync_watch(struct rbd_device *rbd_dev) { struct ceph_osd_req_op *ops; - struct ceph_osd_client *osdc = &dev->rbd_client->client->osdc; + struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; + int ret; - int ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_WATCH, 0); - if (ret < 0) - return ret; + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_WATCH, 0); + if (!ops) + return -ENOMEM; ret = ceph_osdc_create_event(osdc, rbd_watch_cb, 0, - (void *)dev, &dev->watch_event); + (void *)rbd_dev, &rbd_dev->watch_event); if (ret < 0) goto fail; - ops[0].watch.ver = cpu_to_le64(ver); - ops[0].watch.cookie = cpu_to_le64(dev->watch_event->cookie); + ops[0].watch.ver = cpu_to_le64(rbd_dev->header.obj_version); + ops[0].watch.cookie = cpu_to_le64(rbd_dev->watch_event->cookie); ops[0].watch.flag = 1; - ret = rbd_req_sync_op(dev, NULL, + ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, - 1, obj, 0, 0, NULL, - &dev->watch_request, NULL); + rbd_dev->header_name, + 0, 0, NULL, + &rbd_dev->watch_request, NULL); if (ret < 0) goto fail_event; @@ -1269,8 +1270,8 @@ static int rbd_req_sync_watch(struct rbd_device *dev, return 0; fail_event: - ceph_osdc_cancel_event(dev->watch_event); - dev->watch_event = NULL; + ceph_osdc_cancel_event(rbd_dev->watch_event); + rbd_dev->watch_event = NULL; fail: rbd_destroy_ops(ops); return ret; @@ -1279,64 +1280,65 @@ fail: /* * Request sync osd unwatch */ -static int rbd_req_sync_unwatch(struct rbd_device *dev, - const char *obj) +static int rbd_req_sync_unwatch(struct rbd_device *rbd_dev) { struct ceph_osd_req_op *ops; + int ret; - int ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_WATCH, 0); - if (ret < 0) - return ret; + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_WATCH, 0); + if (!ops) + return -ENOMEM; ops[0].watch.ver = 0; - ops[0].watch.cookie = cpu_to_le64(dev->watch_event->cookie); + ops[0].watch.cookie = cpu_to_le64(rbd_dev->watch_event->cookie); ops[0].watch.flag = 0; - ret = rbd_req_sync_op(dev, NULL, + ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, - 1, obj, 0, 0, NULL, NULL, NULL); + rbd_dev->header_name, + 0, 0, NULL, NULL, NULL); + rbd_destroy_ops(ops); - ceph_osdc_cancel_event(dev->watch_event); - dev->watch_event = NULL; + ceph_osdc_cancel_event(rbd_dev->watch_event); + rbd_dev->watch_event = NULL; return ret; } struct rbd_notify_info { - struct rbd_device *dev; + struct rbd_device *rbd_dev; }; static void rbd_notify_cb(u64 ver, u64 notify_id, u8 opcode, void *data) { - struct rbd_device *dev = (struct rbd_device *)data; - if (!dev) + struct rbd_device *rbd_dev = (struct rbd_device *)data; + if (!rbd_dev) return; - dout("rbd_notify_cb %s notify_id=%lld opcode=%d\n", dev->obj_md_name, - notify_id, (int)opcode); + dout("rbd_notify_cb %s notify_id=%llu opcode=%u\n", + rbd_dev->header_name, (unsigned long long) notify_id, + (unsigned int) opcode); } /* * Request sync osd notify */ -static int rbd_req_sync_notify(struct rbd_device *dev, - const char *obj) +static int rbd_req_sync_notify(struct rbd_device *rbd_dev) { struct ceph_osd_req_op *ops; - struct ceph_osd_client *osdc = &dev->rbd_client->client->osdc; + struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct ceph_osd_event *event; struct rbd_notify_info info; int payload_len = sizeof(u32) + sizeof(u32); int ret; - ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_NOTIFY, payload_len); - if (ret < 0) - return ret; + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_NOTIFY, payload_len); + if (!ops) + return -ENOMEM; - info.dev = dev; + info.rbd_dev = rbd_dev; ret = ceph_osdc_create_event(osdc, rbd_notify_cb, 1, (void *)&info, &event); @@ -1349,12 +1351,12 @@ static int rbd_req_sync_notify(struct rbd_device *dev, ops[0].watch.prot_ver = RADOS_NOTIFY_VER; ops[0].watch.timeout = 12; - ret = rbd_req_sync_op(dev, NULL, + ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, - 1, obj, 0, 0, NULL, NULL, NULL); + rbd_dev->header_name, + 0, 0, NULL, NULL, NULL); if (ret < 0) goto fail_event; @@ -1373,36 +1375,37 @@ fail: /* * Request sync osd read */ -static int rbd_req_sync_exec(struct rbd_device *dev, - const char *obj, - const char *cls, - const char *method, +static int rbd_req_sync_exec(struct rbd_device *rbd_dev, + const char *object_name, + const char *class_name, + const char *method_name, const char *data, int len, u64 *ver) { struct ceph_osd_req_op *ops; - int cls_len = strlen(cls); - int method_len = strlen(method); - int ret = rbd_create_rw_ops(&ops, 1, CEPH_OSD_OP_CALL, - cls_len + method_len + len); - if (ret < 0) - return ret; + int class_name_len = strlen(class_name); + int method_name_len = strlen(method_name); + int ret; - ops[0].cls.class_name = cls; - ops[0].cls.class_len = (__u8)cls_len; - ops[0].cls.method_name = method; - ops[0].cls.method_len = (__u8)method_len; + ops = rbd_create_rw_ops(1, CEPH_OSD_OP_CALL, + class_name_len + method_name_len + len); + if (!ops) + return -ENOMEM; + + ops[0].cls.class_name = class_name; + ops[0].cls.class_len = (__u8) class_name_len; + ops[0].cls.method_name = method_name; + ops[0].cls.method_len = (__u8) method_name_len; ops[0].cls.argc = 0; ops[0].cls.indata = data; ops[0].cls.indata_len = len; - ret = rbd_req_sync_op(dev, NULL, + ret = rbd_req_sync_op(rbd_dev, NULL, CEPH_NOSNAP, - 0, CEPH_OSD_FLAG_WRITE | CEPH_OSD_FLAG_ONDISK, ops, - 1, obj, 0, 0, NULL, NULL, ver); + object_name, 0, 0, NULL, NULL, ver); rbd_destroy_ops(ops); @@ -1437,10 +1440,12 @@ static void rbd_rq_fn(struct request_queue *q) struct bio *bio; struct bio *rq_bio, *next_bio = NULL; bool do_write; - int size, op_size = 0; + unsigned int size; + u64 op_size = 0; u64 ofs; int num_segs, cur_seg = 0; struct rbd_req_coll *coll; + struct ceph_snap_context *snapc; /* peek at request from block layer */ if (!rq) @@ -1467,23 +1472,38 @@ static void rbd_rq_fn(struct request_queue *q) spin_unlock_irq(q->queue_lock); + down_read(&rbd_dev->header_rwsem); + + if (rbd_dev->snap_id != CEPH_NOSNAP && !rbd_dev->snap_exists) { + up_read(&rbd_dev->header_rwsem); + dout("request for non-existent snapshot"); + spin_lock_irq(q->queue_lock); + __blk_end_request_all(rq, -ENXIO); + continue; + } + + snapc = ceph_get_snap_context(rbd_dev->header.snapc); + + up_read(&rbd_dev->header_rwsem); + dout("%s 0x%x bytes at 0x%llx\n", do_write ? "write" : "read", - size, blk_rq_pos(rq) * SECTOR_SIZE); + size, (unsigned long long) blk_rq_pos(rq) * SECTOR_SIZE); num_segs = rbd_get_num_segments(&rbd_dev->header, ofs, size); coll = rbd_alloc_coll(num_segs); if (!coll) { spin_lock_irq(q->queue_lock); __blk_end_request_all(rq, -ENOMEM); + ceph_put_snap_context(snapc); continue; } do { /* a bio clone to be passed down to OSD req */ - dout("rq->bio->bi_vcnt=%d\n", rq->bio->bi_vcnt); + dout("rq->bio->bi_vcnt=%hu\n", rq->bio->bi_vcnt); op_size = rbd_get_segment(&rbd_dev->header, - rbd_dev->header.block_name, + rbd_dev->header.object_prefix, ofs, size, NULL, NULL); kref_get(&coll->kref); @@ -1499,7 +1519,7 @@ static void rbd_rq_fn(struct request_queue *q) /* init OSD command: write or read */ if (do_write) rbd_req_write(rq, rbd_dev, - rbd_dev->header.snapc, + snapc, ofs, op_size, bio, coll, cur_seg); @@ -1522,6 +1542,8 @@ next_seg: if (bp) bio_pair_release(bp); spin_lock_irq(q->queue_lock); + + ceph_put_snap_context(snapc); } } @@ -1592,18 +1614,19 @@ static int rbd_read_header(struct rbd_device *rbd_dev, return -ENOMEM; rc = rbd_req_sync_read(rbd_dev, - NULL, CEPH_NOSNAP, - rbd_dev->obj_md_name, + CEPH_NOSNAP, + rbd_dev->header_name, 0, len, (char *)dh, &ver); if (rc < 0) goto out_dh; - rc = rbd_header_from_disk(header, dh, snap_count, GFP_KERNEL); + rc = rbd_header_from_disk(header, dh, snap_count); if (rc < 0) { if (rc == -ENXIO) pr_warning("unrecognized header format" - " for image %s", rbd_dev->obj); + " for image %s\n", + rbd_dev->image_name); goto out_dh; } @@ -1628,7 +1651,7 @@ out_dh: /* * create a snapshot */ -static int rbd_header_add_snap(struct rbd_device *dev, +static int rbd_header_add_snap(struct rbd_device *rbd_dev, const char *snap_name, gfp_t gfp_flags) { @@ -1636,16 +1659,15 @@ static int rbd_header_add_snap(struct rbd_device *dev, u64 new_snapid; int ret; void *data, *p, *e; - u64 ver; struct ceph_mon_client *monc; /* we should create a snapshot only if we're pointing at the head */ - if (dev->snap_id != CEPH_NOSNAP) + if (rbd_dev->snap_id != CEPH_NOSNAP) return -EINVAL; - monc = &dev->rbd_client->client->monc; - ret = ceph_monc_create_snapid(monc, dev->poolid, &new_snapid); - dout("created snapid=%lld\n", new_snapid); + monc = &rbd_dev->rbd_client->client->monc; + ret = ceph_monc_create_snapid(monc, rbd_dev->pool_id, &new_snapid); + dout("created snapid=%llu\n", (unsigned long long) new_snapid); if (ret < 0) return ret; @@ -1659,19 +1681,13 @@ static int rbd_header_add_snap(struct rbd_device *dev, ceph_encode_string_safe(&p, e, snap_name, name_len, bad); ceph_encode_64_safe(&p, e, new_snapid, bad); - ret = rbd_req_sync_exec(dev, dev->obj_md_name, "rbd", "snap_add", - data, p - data, &ver); + ret = rbd_req_sync_exec(rbd_dev, rbd_dev->header_name, + "rbd", "snap_add", + data, p - data, NULL); kfree(data); - if (ret < 0) - return ret; - - down_write(&dev->header_rwsem); - dev->header.snapc->seq = new_snapid; - up_write(&dev->header_rwsem); - - return 0; + return ret < 0 ? ret : 0; bad: return -ERANGE; } @@ -1679,52 +1695,52 @@ bad: static void __rbd_remove_all_snaps(struct rbd_device *rbd_dev) { struct rbd_snap *snap; + struct rbd_snap *next; - while (!list_empty(&rbd_dev->snaps)) { - snap = list_first_entry(&rbd_dev->snaps, struct rbd_snap, node); - __rbd_remove_snap_dev(rbd_dev, snap); - } + list_for_each_entry_safe(snap, next, &rbd_dev->snaps, node) + __rbd_remove_snap_dev(snap); } /* * only read the first part of the ondisk header, without the snaps info */ -static int __rbd_refresh_header(struct rbd_device *rbd_dev) +static int __rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) { int ret; struct rbd_image_header h; - u64 snap_seq; - int follow_seq = 0; ret = rbd_read_header(rbd_dev, &h); if (ret < 0) return ret; - /* resized? */ - set_capacity(rbd_dev->disk, h.image_size / SECTOR_SIZE); - down_write(&rbd_dev->header_rwsem); - snap_seq = rbd_dev->header.snapc->seq; - if (rbd_dev->header.total_snaps && - rbd_dev->header.snapc->snaps[0] == snap_seq) - /* pointing at the head, will need to follow that - if head moves */ - follow_seq = 1; + /* resized? */ + if (rbd_dev->snap_id == CEPH_NOSNAP) { + sector_t size = (sector_t) h.image_size / SECTOR_SIZE; - kfree(rbd_dev->header.snapc); - kfree(rbd_dev->header.snap_names); + dout("setting size to %llu sectors", (unsigned long long) size); + set_capacity(rbd_dev->disk, size); + } + + /* rbd_dev->header.object_prefix shouldn't change */ kfree(rbd_dev->header.snap_sizes); + kfree(rbd_dev->header.snap_names); + /* osd requests may still refer to snapc */ + ceph_put_snap_context(rbd_dev->header.snapc); + if (hver) + *hver = h.obj_version; + rbd_dev->header.obj_version = h.obj_version; + rbd_dev->header.image_size = h.image_size; rbd_dev->header.total_snaps = h.total_snaps; rbd_dev->header.snapc = h.snapc; rbd_dev->header.snap_names = h.snap_names; rbd_dev->header.snap_names_len = h.snap_names_len; rbd_dev->header.snap_sizes = h.snap_sizes; - if (follow_seq) - rbd_dev->header.snapc->seq = rbd_dev->header.snapc->snaps[0]; - else - rbd_dev->header.snapc->seq = snap_seq; + /* Free the extra copy of the object prefix */ + WARN_ON(strcmp(rbd_dev->header.object_prefix, h.object_prefix)); + kfree(h.object_prefix); ret = __rbd_init_snaps_header(rbd_dev); @@ -1733,6 +1749,17 @@ static int __rbd_refresh_header(struct rbd_device *rbd_dev) return ret; } +static int rbd_refresh_header(struct rbd_device *rbd_dev, u64 *hver) +{ + int ret; + + mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); + ret = __rbd_refresh_header(rbd_dev, hver); + mutex_unlock(&ctl_mutex); + + return ret; +} + static int rbd_init_disk(struct rbd_device *rbd_dev) { struct gendisk *disk; @@ -1762,7 +1789,7 @@ static int rbd_init_disk(struct rbd_device *rbd_dev) goto out; snprintf(disk->disk_name, sizeof(disk->disk_name), RBD_DRV_NAME "%d", - rbd_dev->id); + rbd_dev->dev_id); disk->major = rbd_dev->major; disk->first_minor = 0; disk->fops = &rbd_bd_ops; @@ -1819,8 +1846,13 @@ static ssize_t rbd_size_show(struct device *dev, struct device_attribute *attr, char *buf) { struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); + sector_t size; + + down_read(&rbd_dev->header_rwsem); + size = get_capacity(rbd_dev->disk); + up_read(&rbd_dev->header_rwsem); - return sprintf(buf, "%llu\n", (unsigned long long)rbd_dev->header.image_size); + return sprintf(buf, "%llu\n", (unsigned long long) size * SECTOR_SIZE); } static ssize_t rbd_major_show(struct device *dev, @@ -1848,12 +1880,20 @@ static ssize_t rbd_pool_show(struct device *dev, return sprintf(buf, "%s\n", rbd_dev->pool_name); } +static ssize_t rbd_pool_id_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); + + return sprintf(buf, "%d\n", rbd_dev->pool_id); +} + static ssize_t rbd_name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); - return sprintf(buf, "%s\n", rbd_dev->obj); + return sprintf(buf, "%s\n", rbd_dev->image_name); } static ssize_t rbd_snap_show(struct device *dev, @@ -1871,23 +1911,18 @@ static ssize_t rbd_image_refresh(struct device *dev, size_t size) { struct rbd_device *rbd_dev = dev_to_rbd_dev(dev); - int rc; - int ret = size; - - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); + int ret; - rc = __rbd_refresh_header(rbd_dev); - if (rc < 0) - ret = rc; + ret = rbd_refresh_header(rbd_dev, NULL); - mutex_unlock(&ctl_mutex); - return ret; + return ret < 0 ? ret : size; } static DEVICE_ATTR(size, S_IRUGO, rbd_size_show, NULL); static DEVICE_ATTR(major, S_IRUGO, rbd_major_show, NULL); static DEVICE_ATTR(client_id, S_IRUGO, rbd_client_id_show, NULL); static DEVICE_ATTR(pool, S_IRUGO, rbd_pool_show, NULL); +static DEVICE_ATTR(pool_id, S_IRUGO, rbd_pool_id_show, NULL); static DEVICE_ATTR(name, S_IRUGO, rbd_name_show, NULL); static DEVICE_ATTR(refresh, S_IWUSR, NULL, rbd_image_refresh); static DEVICE_ATTR(current_snap, S_IRUGO, rbd_snap_show, NULL); @@ -1898,6 +1933,7 @@ static struct attribute *rbd_attrs[] = { &dev_attr_major.attr, &dev_attr_client_id.attr, &dev_attr_pool.attr, + &dev_attr_pool_id.attr, &dev_attr_name.attr, &dev_attr_current_snap.attr, &dev_attr_refresh.attr, @@ -1977,15 +2013,13 @@ static struct device_type rbd_snap_device_type = { .release = rbd_snap_dev_release, }; -static void __rbd_remove_snap_dev(struct rbd_device *rbd_dev, - struct rbd_snap *snap) +static void __rbd_remove_snap_dev(struct rbd_snap *snap) { list_del(&snap->node); device_unregister(&snap->dev); } -static int rbd_register_snap_dev(struct rbd_device *rbd_dev, - struct rbd_snap *snap, +static int rbd_register_snap_dev(struct rbd_snap *snap, struct device *parent) { struct device *dev = &snap->dev; @@ -2000,29 +2034,36 @@ static int rbd_register_snap_dev(struct rbd_device *rbd_dev, return ret; } -static int __rbd_add_snap_dev(struct rbd_device *rbd_dev, - int i, const char *name, - struct rbd_snap **snapp) +static struct rbd_snap *__rbd_add_snap_dev(struct rbd_device *rbd_dev, + int i, const char *name) { + struct rbd_snap *snap; int ret; - struct rbd_snap *snap = kzalloc(sizeof(*snap), GFP_KERNEL); + + snap = kzalloc(sizeof (*snap), GFP_KERNEL); if (!snap) - return -ENOMEM; + return ERR_PTR(-ENOMEM); + + ret = -ENOMEM; snap->name = kstrdup(name, GFP_KERNEL); + if (!snap->name) + goto err; + snap->size = rbd_dev->header.snap_sizes[i]; snap->id = rbd_dev->header.snapc->snaps[i]; if (device_is_registered(&rbd_dev->dev)) { - ret = rbd_register_snap_dev(rbd_dev, snap, - &rbd_dev->dev); + ret = rbd_register_snap_dev(snap, &rbd_dev->dev); if (ret < 0) goto err; } - *snapp = snap; - return 0; + + return snap; + err: kfree(snap->name); kfree(snap); - return ret; + + return ERR_PTR(ret); } /* @@ -2055,7 +2096,6 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) const char *name, *first_name; int i = rbd_dev->header.total_snaps; struct rbd_snap *snap, *old_snap = NULL; - int ret; struct list_head *p, *n; first_name = rbd_dev->header.snap_names; @@ -2070,8 +2110,15 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) cur_id = rbd_dev->header.snapc->snaps[i - 1]; if (!i || old_snap->id < cur_id) { - /* old_snap->id was skipped, thus was removed */ - __rbd_remove_snap_dev(rbd_dev, old_snap); + /* + * old_snap->id was skipped, thus was + * removed. If this rbd_dev is mapped to + * the removed snapshot, record that it no + * longer exists, to prevent further I/O. + */ + if (rbd_dev->snap_id == old_snap->id) + rbd_dev->snap_exists = false; + __rbd_remove_snap_dev(old_snap); continue; } if (old_snap->id == cur_id) { @@ -2091,9 +2138,9 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) if (cur_id >= old_snap->id) break; /* a new snapshot */ - ret = __rbd_add_snap_dev(rbd_dev, i - 1, name, &snap); - if (ret < 0) - return ret; + snap = __rbd_add_snap_dev(rbd_dev, i - 1, name); + if (IS_ERR(snap)) + return PTR_ERR(snap); /* note that we add it backward so using n and not p */ list_add(&snap->node, n); @@ -2107,9 +2154,9 @@ static int __rbd_init_snaps_header(struct rbd_device *rbd_dev) WARN_ON(1); return -EINVAL; } - ret = __rbd_add_snap_dev(rbd_dev, i - 1, name, &snap); - if (ret < 0) - return ret; + snap = __rbd_add_snap_dev(rbd_dev, i - 1, name); + if (IS_ERR(snap)) + return PTR_ERR(snap); list_add(&snap->node, &rbd_dev->snaps); } @@ -2129,14 +2176,13 @@ static int rbd_bus_add_dev(struct rbd_device *rbd_dev) dev->type = &rbd_device_type; dev->parent = &rbd_root_dev; dev->release = rbd_dev_release; - dev_set_name(dev, "%d", rbd_dev->id); + dev_set_name(dev, "%d", rbd_dev->dev_id); ret = device_register(dev); if (ret < 0) goto out; list_for_each_entry(snap, &rbd_dev->snaps, node) { - ret = rbd_register_snap_dev(rbd_dev, snap, - &rbd_dev->dev); + ret = rbd_register_snap_dev(snap, &rbd_dev->dev); if (ret < 0) break; } @@ -2155,12 +2201,9 @@ static int rbd_init_watch_dev(struct rbd_device *rbd_dev) int ret, rc; do { - ret = rbd_req_sync_watch(rbd_dev, rbd_dev->obj_md_name, - rbd_dev->header.obj_version); + ret = rbd_req_sync_watch(rbd_dev); if (ret == -ERANGE) { - mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING); - rc = __rbd_refresh_header(rbd_dev); - mutex_unlock(&ctl_mutex); + rc = rbd_refresh_header(rbd_dev, NULL); if (rc < 0) return rc; } @@ -2177,7 +2220,7 @@ static atomic64_t rbd_id_max = ATOMIC64_INIT(0); */ static void rbd_id_get(struct rbd_device *rbd_dev) { - rbd_dev->id = atomic64_inc_return(&rbd_id_max); + rbd_dev->dev_id = atomic64_inc_return(&rbd_id_max); spin_lock(&rbd_dev_list_lock); list_add_tail(&rbd_dev->node, &rbd_dev_list); @@ -2191,7 +2234,7 @@ static void rbd_id_get(struct rbd_device *rbd_dev) static void rbd_id_put(struct rbd_device *rbd_dev) { struct list_head *tmp; - int rbd_id = rbd_dev->id; + int rbd_id = rbd_dev->dev_id; int max_id; BUG_ON(rbd_id < 1); @@ -2282,19 +2325,58 @@ static inline size_t copy_token(const char **buf, } /* - * This fills in the pool_name, obj, obj_len, snap_name, obj_len, + * Finds the next token in *buf, dynamically allocates a buffer big + * enough to hold a copy of it, and copies the token into the new + * buffer. The copy is guaranteed to be terminated with '\0'. Note + * that a duplicate buffer is created even for a zero-length token. + * + * Returns a pointer to the newly-allocated duplicate, or a null + * pointer if memory for the duplicate was not available. If + * the lenp argument is a non-null pointer, the length of the token + * (not including the '\0') is returned in *lenp. + * + * If successful, the *buf pointer will be updated to point beyond + * the end of the found token. + * + * Note: uses GFP_KERNEL for allocation. + */ +static inline char *dup_token(const char **buf, size_t *lenp) +{ + char *dup; + size_t len; + + len = next_token(buf); + dup = kmalloc(len + 1, GFP_KERNEL); + if (!dup) + return NULL; + + memcpy(dup, *buf, len); + *(dup + len) = '\0'; + *buf += len; + + if (lenp) + *lenp = len; + + return dup; +} + +/* + * This fills in the pool_name, image_name, image_name_len, snap_name, * rbd_dev, rbd_md_name, and name fields of the given rbd_dev, based * on the list of monitor addresses and other options provided via * /sys/bus/rbd/add. + * + * Note: rbd_dev is assumed to have been initially zero-filled. */ static int rbd_add_parse_args(struct rbd_device *rbd_dev, const char *buf, const char **mon_addrs, size_t *mon_addrs_size, char *options, - size_t options_size) + size_t options_size) { - size_t len; + size_t len; + int ret; /* The first four tokens are required */ @@ -2310,56 +2392,74 @@ static int rbd_add_parse_args(struct rbd_device *rbd_dev, if (!len || len >= options_size) return -EINVAL; - len = copy_token(&buf, rbd_dev->pool_name, sizeof (rbd_dev->pool_name)); - if (!len || len >= sizeof (rbd_dev->pool_name)) - return -EINVAL; - - len = copy_token(&buf, rbd_dev->obj, sizeof (rbd_dev->obj)); - if (!len || len >= sizeof (rbd_dev->obj)) - return -EINVAL; + ret = -ENOMEM; + rbd_dev->pool_name = dup_token(&buf, NULL); + if (!rbd_dev->pool_name) + goto out_err; - /* We have the object length in hand, save it. */ + rbd_dev->image_name = dup_token(&buf, &rbd_dev->image_name_len); + if (!rbd_dev->image_name) + goto out_err; - rbd_dev->obj_len = len; + /* Create the name of the header object */ - BUILD_BUG_ON(RBD_MAX_MD_NAME_LEN - < RBD_MAX_OBJ_NAME_LEN + sizeof (RBD_SUFFIX)); - sprintf(rbd_dev->obj_md_name, "%s%s", rbd_dev->obj, RBD_SUFFIX); + rbd_dev->header_name = kmalloc(rbd_dev->image_name_len + + sizeof (RBD_SUFFIX), + GFP_KERNEL); + if (!rbd_dev->header_name) + goto out_err; + sprintf(rbd_dev->header_name, "%s%s", rbd_dev->image_name, RBD_SUFFIX); /* - * The snapshot name is optional, but it's an error if it's - * too long. If no snapshot is supplied, fill in the default. + * The snapshot name is optional. If none is is supplied, + * we use the default value. */ - len = copy_token(&buf, rbd_dev->snap_name, sizeof (rbd_dev->snap_name)); - if (!len) + rbd_dev->snap_name = dup_token(&buf, &len); + if (!rbd_dev->snap_name) + goto out_err; + if (!len) { + /* Replace the empty name with the default */ + kfree(rbd_dev->snap_name); + rbd_dev->snap_name + = kmalloc(sizeof (RBD_SNAP_HEAD_NAME), GFP_KERNEL); + if (!rbd_dev->snap_name) + goto out_err; + memcpy(rbd_dev->snap_name, RBD_SNAP_HEAD_NAME, sizeof (RBD_SNAP_HEAD_NAME)); - else if (len >= sizeof (rbd_dev->snap_name)) - return -EINVAL; + } return 0; + +out_err: + kfree(rbd_dev->header_name); + kfree(rbd_dev->image_name); + kfree(rbd_dev->pool_name); + rbd_dev->pool_name = NULL; + + return ret; } static ssize_t rbd_add(struct bus_type *bus, const char *buf, size_t count) { - struct rbd_device *rbd_dev; + char *options; + struct rbd_device *rbd_dev = NULL; const char *mon_addrs = NULL; size_t mon_addrs_size = 0; - char *options = NULL; struct ceph_osd_client *osdc; int rc = -ENOMEM; if (!try_module_get(THIS_MODULE)) return -ENODEV; - rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); - if (!rbd_dev) - goto err_nomem; options = kmalloc(count, GFP_KERNEL); if (!options) goto err_nomem; + rbd_dev = kzalloc(sizeof(*rbd_dev), GFP_KERNEL); + if (!rbd_dev) + goto err_nomem; /* static rbd_device initialization */ spin_lock_init(&rbd_dev->lock); @@ -2367,15 +2467,13 @@ static ssize_t rbd_add(struct bus_type *bus, INIT_LIST_HEAD(&rbd_dev->snaps); init_rwsem(&rbd_dev->header_rwsem); - init_rwsem(&rbd_dev->header_rwsem); - /* generate unique id: find highest unique id, add one */ rbd_id_get(rbd_dev); /* Fill in the device name, now that we have its id. */ BUILD_BUG_ON(DEV_NAME_LEN < sizeof (RBD_DRV_NAME) + MAX_INT_FORMAT_WIDTH); - sprintf(rbd_dev->name, "%s%d", RBD_DRV_NAME, rbd_dev->id); + sprintf(rbd_dev->name, "%s%d", RBD_DRV_NAME, rbd_dev->dev_id); /* parse add command */ rc = rbd_add_parse_args(rbd_dev, buf, &mon_addrs, &mon_addrs_size, @@ -2395,7 +2493,7 @@ static ssize_t rbd_add(struct bus_type *bus, rc = ceph_pg_poolid_by_name(osdc->osdmap, rbd_dev->pool_name); if (rc < 0) goto err_out_client; - rbd_dev->poolid = rc; + rbd_dev->pool_id = rc; /* register our block device */ rc = register_blkdev(0, rbd_dev->name); @@ -2435,10 +2533,16 @@ err_out_blkdev: err_out_client: rbd_put_client(rbd_dev); err_put_id: + if (rbd_dev->pool_name) { + kfree(rbd_dev->snap_name); + kfree(rbd_dev->header_name); + kfree(rbd_dev->image_name); + kfree(rbd_dev->pool_name); + } rbd_id_put(rbd_dev); err_nomem: - kfree(options); kfree(rbd_dev); + kfree(options); dout("Error adding device %s\n", buf); module_put(THIS_MODULE); @@ -2446,7 +2550,7 @@ err_nomem: return (ssize_t) rc; } -static struct rbd_device *__rbd_get_dev(unsigned long id) +static struct rbd_device *__rbd_get_dev(unsigned long dev_id) { struct list_head *tmp; struct rbd_device *rbd_dev; @@ -2454,7 +2558,7 @@ static struct rbd_device *__rbd_get_dev(unsigned long id) spin_lock(&rbd_dev_list_lock); list_for_each(tmp, &rbd_dev_list) { rbd_dev = list_entry(tmp, struct rbd_device, node); - if (rbd_dev->id == id) { + if (rbd_dev->dev_id == dev_id) { spin_unlock(&rbd_dev_list_lock); return rbd_dev; } @@ -2474,7 +2578,7 @@ static void rbd_dev_release(struct device *dev) rbd_dev->watch_request); } if (rbd_dev->watch_event) - rbd_req_sync_unwatch(rbd_dev, rbd_dev->obj_md_name); + rbd_req_sync_unwatch(rbd_dev); rbd_put_client(rbd_dev); @@ -2483,6 +2587,10 @@ static void rbd_dev_release(struct device *dev) unregister_blkdev(rbd_dev->major, rbd_dev->name); /* done with the id, and with the rbd_dev */ + kfree(rbd_dev->snap_name); + kfree(rbd_dev->header_name); + kfree(rbd_dev->pool_name); + kfree(rbd_dev->image_name); rbd_id_put(rbd_dev); kfree(rbd_dev); @@ -2544,7 +2652,7 @@ static ssize_t rbd_snap_add(struct device *dev, if (ret < 0) goto err_unlock; - ret = __rbd_refresh_header(rbd_dev); + ret = __rbd_refresh_header(rbd_dev, NULL); if (ret < 0) goto err_unlock; @@ -2553,7 +2661,7 @@ static ssize_t rbd_snap_add(struct device *dev, mutex_unlock(&ctl_mutex); /* make a best effort, don't error if failed */ - rbd_req_sync_notify(rbd_dev, rbd_dev->obj_md_name); + rbd_req_sync_notify(rbd_dev); ret = count; kfree(name); diff --git a/drivers/block/rbd_types.h b/drivers/block/rbd_types.h index 9507086..0924e9e 100644 --- a/drivers/block/rbd_types.h +++ b/drivers/block/rbd_types.h @@ -31,7 +31,6 @@ #define RBD_MIN_OBJ_ORDER 16 #define RBD_MAX_OBJ_ORDER 30 -#define RBD_MAX_OBJ_NAME_LEN 96 #define RBD_MAX_SEG_NAME_LEN 128 #define RBD_COMP_NONE 0 diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c index 00894ff..f391f1e 100644 --- a/fs/ceph/dir.c +++ b/fs/ceph/dir.c @@ -51,8 +51,7 @@ int ceph_init_dentry(struct dentry *dentry) goto out_unlock; } - if (dentry->d_parent == NULL || /* nfs fh_to_dentry */ - ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) + if (ceph_snap(dentry->d_parent->d_inode) == CEPH_NOSNAP) d_set_d_op(dentry, &ceph_dentry_ops); else if (ceph_snap(dentry->d_parent->d_inode) == CEPH_SNAPDIR) d_set_d_op(dentry, &ceph_snapdir_dentry_ops); @@ -79,7 +78,7 @@ struct inode *ceph_get_dentry_parent_inode(struct dentry *dentry) return NULL; spin_lock(&dentry->d_lock); - if (dentry->d_parent) { + if (!IS_ROOT(dentry)) { inode = dentry->d_parent->d_inode; ihold(inode); } @@ -1154,7 +1153,7 @@ static void ceph_d_prune(struct dentry *dentry) dout("ceph_d_prune %p\n", dentry); /* do we have a valid parent? */ - if (!dentry->d_parent || IS_ROOT(dentry)) + if (IS_ROOT(dentry)) return; /* if we are not hashed, we don't affect D_COMPLETE */ diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 200bc87..a5a7354 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -10,6 +10,7 @@ #include "super.h" #include "mds_client.h" +#include <linux/ceph/ceph_features.h> #include <linux/ceph/messenger.h> #include <linux/ceph/decode.h> #include <linux/ceph/pagelist.h> @@ -394,11 +395,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, s->s_seq = 0; mutex_init(&s->s_mutex); - ceph_con_init(mdsc->fsc->client->msgr, &s->s_con); - s->s_con.private = s; - s->s_con.ops = &mds_con_ops; - s->s_con.peer_name.type = CEPH_ENTITY_TYPE_MDS; - s->s_con.peer_name.num = cpu_to_le64(mds); + ceph_con_init(&s->s_con, s, &mds_con_ops, &mdsc->fsc->client->msgr); spin_lock_init(&s->s_gen_ttl_lock); s->s_cap_gen = 0; @@ -440,7 +437,8 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc, mdsc->sessions[mds] = s; atomic_inc(&s->s_ref); /* one ref to sessions[], one to caller */ - ceph_con_open(&s->s_con, ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); + ceph_con_open(&s->s_con, CEPH_ENTITY_TYPE_MDS, mds, + ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); return s; @@ -1472,11 +1470,6 @@ retry: else len += 1 + temp->d_name.len; temp = temp->d_parent; - if (temp == NULL) { - rcu_read_unlock(); - pr_err("build_path corrupt dentry %p\n", dentry); - return ERR_PTR(-EINVAL); - } } rcu_read_unlock(); if (len) @@ -1513,12 +1506,6 @@ retry: if (pos) path[--pos] = '/'; temp = temp->d_parent; - if (temp == NULL) { - rcu_read_unlock(); - pr_err("build_path corrupt dentry\n"); - kfree(path); - return ERR_PTR(-EINVAL); - } } rcu_read_unlock(); if (pos != 0 || read_seqretry(&rename_lock, seq)) { @@ -2531,7 +2518,9 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc, session->s_state = CEPH_MDS_SESSION_RECONNECTING; session->s_seq = 0; + ceph_con_close(&session->s_con); ceph_con_open(&session->s_con, + CEPH_ENTITY_TYPE_MDS, mds, ceph_mdsmap_get_addr(mdsc->mdsmap, mds)); /* replay unsafe requests */ diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c index e5206fc..cbb2f54 100644 --- a/fs/ceph/snap.c +++ b/fs/ceph/snap.c @@ -296,8 +296,7 @@ static int build_snap_context(struct ceph_snap_realm *realm) struct ceph_snap_realm *parent = realm->parent; struct ceph_snap_context *snapc; int err = 0; - int i; - int num = realm->num_prior_parent_snaps + realm->num_snaps; + u32 num = realm->num_prior_parent_snaps + realm->num_snaps; /* * build parent context, if it hasn't been built. @@ -321,11 +320,11 @@ static int build_snap_context(struct ceph_snap_realm *realm) realm->cached_context->seq == realm->seq && (!parent || realm->cached_context->seq >= parent->cached_context->seq)) { - dout("build_snap_context %llx %p: %p seq %lld (%d snaps)" + dout("build_snap_context %llx %p: %p seq %lld (%u snaps)" " (unchanged)\n", realm->ino, realm, realm->cached_context, realm->cached_context->seq, - realm->cached_context->num_snaps); + (unsigned int) realm->cached_context->num_snaps); return 0; } @@ -342,6 +341,8 @@ static int build_snap_context(struct ceph_snap_realm *realm) num = 0; snapc->seq = realm->seq; if (parent) { + u32 i; + /* include any of parent's snaps occurring _after_ my parent became my parent */ for (i = 0; i < parent->cached_context->num_snaps; i++) @@ -361,8 +362,9 @@ static int build_snap_context(struct ceph_snap_realm *realm) sort(snapc->snaps, num, sizeof(u64), cmpu64_rev, NULL); snapc->num_snaps = num; - dout("build_snap_context %llx %p: %p seq %lld (%d snaps)\n", - realm->ino, realm, snapc, snapc->seq, snapc->num_snaps); + dout("build_snap_context %llx %p: %p seq %lld (%u snaps)\n", + realm->ino, realm, snapc, snapc->seq, + (unsigned int) snapc->num_snaps); if (realm->cached_context) ceph_put_snap_context(realm->cached_context); @@ -402,9 +404,9 @@ static void rebuild_snap_realms(struct ceph_snap_realm *realm) * helper to allocate and decode an array of snapids. free prior * instance, if any. */ -static int dup_array(u64 **dst, __le64 *src, int num) +static int dup_array(u64 **dst, __le64 *src, u32 num) { - int i; + u32 i; kfree(*dst); if (num) { diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 7076109..b982239 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -18,6 +18,7 @@ #include "super.h" #include "mds_client.h" +#include <linux/ceph/ceph_features.h> #include <linux/ceph/decode.h> #include <linux/ceph/mon_client.h> #include <linux/ceph/auth.h> diff --git a/fs/ceph/super.h b/fs/ceph/super.h index f4d5522..ebc95cc 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -612,9 +612,9 @@ struct ceph_snap_realm { u64 parent_since; /* snapid when our current parent became so */ u64 *prior_parent_snaps; /* snaps inherited from any parents we */ - int num_prior_parent_snaps; /* had prior to parent_since */ + u32 num_prior_parent_snaps; /* had prior to parent_since */ u64 *snaps; /* snaps specific to this realm */ - int num_snaps; + u32 num_snaps; struct ceph_snap_realm *parent; struct list_head children; /* list of child realms */ diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c index 785cb30..2c2ae5b 100644 --- a/fs/ceph/xattr.c +++ b/fs/ceph/xattr.c @@ -457,6 +457,7 @@ start: for (i = 0; i < numattr; i++) kfree(xattrs[i]); kfree(xattrs); + xattrs = NULL; goto start; } err = -EIO; diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h new file mode 100644 index 0000000..dad579b --- /dev/null +++ b/include/linux/ceph/ceph_features.h @@ -0,0 +1,27 @@ +#ifndef __CEPH_FEATURES +#define __CEPH_FEATURES + +/* + * feature bits + */ +#define CEPH_FEATURE_UID (1<<0) +#define CEPH_FEATURE_NOSRCADDR (1<<1) +#define CEPH_FEATURE_MONCLOCKCHECK (1<<2) +#define CEPH_FEATURE_FLOCK (1<<3) +#define CEPH_FEATURE_SUBSCRIBE2 (1<<4) +#define CEPH_FEATURE_MONNAMES (1<<5) +#define CEPH_FEATURE_RECONNECT_SEQ (1<<6) +#define CEPH_FEATURE_DIRLAYOUTHASH (1<<7) +/* bits 8-17 defined by user-space; not supported yet here */ +#define CEPH_FEATURE_CRUSH_TUNABLES (1<<18) + +/* + * Features supported. + */ +#define CEPH_FEATURES_SUPPORTED_DEFAULT \ + (CEPH_FEATURE_NOSRCADDR | \ + CEPH_FEATURE_CRUSH_TUNABLES) + +#define CEPH_FEATURES_REQUIRED_DEFAULT \ + (CEPH_FEATURE_NOSRCADDR) +#endif diff --git a/include/linux/ceph/ceph_fs.h b/include/linux/ceph/ceph_fs.h index e81ab30..d021610 100644 --- a/include/linux/ceph/ceph_fs.h +++ b/include/linux/ceph/ceph_fs.h @@ -35,20 +35,6 @@ /* arbitrary limit on max # of monitors (cluster of 3 is typical) */ #define CEPH_MAX_MON 31 - -/* - * feature bits - */ -#define CEPH_FEATURE_UID (1<<0) -#define CEPH_FEATURE_NOSRCADDR (1<<1) -#define CEPH_FEATURE_MONCLOCKCHECK (1<<2) -#define CEPH_FEATURE_FLOCK (1<<3) -#define CEPH_FEATURE_SUBSCRIBE2 (1<<4) -#define CEPH_FEATURE_MONNAMES (1<<5) -#define CEPH_FEATURE_RECONNECT_SEQ (1<<6) -#define CEPH_FEATURE_DIRLAYOUTHASH (1<<7) - - /* * ceph_file_layout - describe data layout for a file/inode */ diff --git a/include/linux/ceph/decode.h b/include/linux/ceph/decode.h index d8615de..4bbf2db 100644 --- a/include/linux/ceph/decode.h +++ b/include/linux/ceph/decode.h @@ -1,6 +1,7 @@ #ifndef __CEPH_DECODE_H #define __CEPH_DECODE_H +#include <linux/err.h> #include <linux/bug.h> #include <linux/time.h> #include <asm/unaligned.h> @@ -85,6 +86,52 @@ static inline int ceph_has_room(void **p, void *end, size_t n) } while (0) /* + * Allocate a buffer big enough to hold the wire-encoded string, and + * decode the string into it. The resulting string will always be + * terminated with '\0'. If successful, *p will be advanced + * past the decoded data. Also, if lenp is not a null pointer, the + * length (not including the terminating '\0') will be recorded in + * *lenp. Note that a zero-length string is a valid return value. + * + * Returns a pointer to the newly-allocated string buffer, or a + * pointer-coded errno if an error occurs. Neither *p nor *lenp + * will have been updated if an error is returned. + * + * There are two possible failures: + * - converting the string would require accessing memory at or + * beyond the "end" pointer provided (-E + * - memory could not be allocated for the result + */ +static inline char *ceph_extract_encoded_string(void **p, void *end, + size_t *lenp, gfp_t gfp) +{ + u32 len; + void *sp = *p; + char *buf; + + ceph_decode_32_safe(&sp, end, len, bad); + if (!ceph_has_room(&sp, end, len)) + goto bad; + + buf = kmalloc(len + 1, gfp); + if (!buf) + return ERR_PTR(-ENOMEM); + + if (len) + memcpy(buf, sp, len); + buf[len] = '\0'; + + *p = (char *) *p + sizeof (u32) + len; + if (lenp) + *lenp = (size_t) len; + + return buf; + +bad: + return ERR_PTR(-ERANGE); +} + +/* * struct ceph_timespec <-> struct timespec */ static inline void ceph_decode_timespec(struct timespec *ts, @@ -151,7 +198,7 @@ static inline void ceph_encode_filepath(void **p, void *end, u64 ino, const char *path) { u32 len = path ? strlen(path) : 0; - BUG_ON(*p + sizeof(ino) + sizeof(len) + len > end); + BUG_ON(*p + 1 + sizeof(ino) + sizeof(len) + len > end); ceph_encode_8(p, 1); ceph_encode_64(p, ino); ceph_encode_32(p, len); diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h index e71d683..4262478 100644 --- a/include/linux/ceph/libceph.h +++ b/include/linux/ceph/libceph.h @@ -23,12 +23,6 @@ #include "ceph_fs.h" /* - * Supported features - */ -#define CEPH_FEATURE_SUPPORTED_DEFAULT CEPH_FEATURE_NOSRCADDR -#define CEPH_FEATURE_REQUIRED_DEFAULT CEPH_FEATURE_NOSRCADDR - -/* * mount options */ #define CEPH_OPT_FSID (1<<0) @@ -132,7 +126,7 @@ struct ceph_client { u32 supported_features; u32 required_features; - struct ceph_messenger *msgr; /* messenger instance */ + struct ceph_messenger msgr; /* messenger instance */ struct ceph_mon_client monc; struct ceph_osd_client osdc; @@ -160,7 +154,7 @@ struct ceph_client { struct ceph_snap_context { atomic_t nref; u64 seq; - int num_snaps; + u32 num_snaps; u64 snaps[]; }; diff --git a/include/linux/ceph/messenger.h b/include/linux/ceph/messenger.h index 44c87e7..189ae06 100644 --- a/include/linux/ceph/messenger.h +++ b/include/linux/ceph/messenger.h @@ -31,9 +31,6 @@ struct ceph_connection_operations { int (*verify_authorizer_reply) (struct ceph_connection *con, int len); int (*invalidate_authorizer)(struct ceph_connection *con); - /* protocol version mismatch */ - void (*bad_proto) (struct ceph_connection *con); - /* there was some error on the socket (disconnect, whatever) */ void (*fault) (struct ceph_connection *con); @@ -53,6 +50,7 @@ struct ceph_messenger { struct ceph_entity_inst inst; /* my name+address */ struct ceph_entity_addr my_enc_addr; + atomic_t stopping; bool nocrc; /* @@ -80,7 +78,10 @@ struct ceph_msg { unsigned nr_pages; /* size of page array */ unsigned page_alignment; /* io offset in first page */ struct ceph_pagelist *pagelist; /* instead of pages */ + + struct ceph_connection *con; struct list_head list_head; + struct kref kref; struct bio *bio; /* instead of pages/pagelist */ struct bio *bio_iter; /* bio iterator */ @@ -106,23 +107,6 @@ struct ceph_msg_pos { #define MAX_DELAY_INTERVAL (5 * 60 * HZ) /* - * ceph_connection state bit flags - */ -#define LOSSYTX 0 /* we can close channel or drop messages on errors */ -#define CONNECTING 1 -#define NEGOTIATING 2 -#define KEEPALIVE_PENDING 3 -#define WRITE_PENDING 4 /* we have data ready to send */ -#define STANDBY 8 /* no outgoing messages, socket closed. we keep - * the ceph_connection around to maintain shared - * state with the peer. */ -#define CLOSED 10 /* we've closed the connection */ -#define SOCK_CLOSED 11 /* socket state changed to closed */ -#define OPENING 13 /* open connection w/ (possibly new) peer */ -#define DEAD 14 /* dead, about to kfree */ -#define BACKOFF 15 - -/* * A single connection with another host. * * We maintain a queue of outgoing messages, and some session state to @@ -131,18 +115,22 @@ struct ceph_msg_pos { */ struct ceph_connection { void *private; - atomic_t nref; const struct ceph_connection_operations *ops; struct ceph_messenger *msgr; + + atomic_t sock_state; struct socket *sock; - unsigned long state; /* connection state (see flags above) */ + struct ceph_entity_addr peer_addr; /* peer address */ + struct ceph_entity_addr peer_addr_for_me; + + unsigned long flags; + unsigned long state; const char *error_msg; /* error message, if any */ - struct ceph_entity_addr peer_addr; /* peer address */ struct ceph_entity_name peer_name; /* peer name */ - struct ceph_entity_addr peer_addr_for_me; + unsigned peer_features; u32 connect_seq; /* identify the most recent connection attempt for this connection, client */ @@ -207,24 +195,26 @@ extern int ceph_msgr_init(void); extern void ceph_msgr_exit(void); extern void ceph_msgr_flush(void); -extern struct ceph_messenger *ceph_messenger_create( - struct ceph_entity_addr *myaddr, - u32 features, u32 required); -extern void ceph_messenger_destroy(struct ceph_messenger *); +extern void ceph_messenger_init(struct ceph_messenger *msgr, + struct ceph_entity_addr *myaddr, + u32 supported_features, + u32 required_features, + bool nocrc); -extern void ceph_con_init(struct ceph_messenger *msgr, - struct ceph_connection *con); +extern void ceph_con_init(struct ceph_connection *con, void *private, + const struct ceph_connection_operations *ops, + struct ceph_messenger *msgr); extern void ceph_con_open(struct ceph_connection *con, + __u8 entity_type, __u64 entity_num, struct ceph_entity_addr *addr); extern bool ceph_con_opened(struct ceph_connection *con); extern void ceph_con_close(struct ceph_connection *con); extern void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg); -extern void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg); -extern void ceph_con_revoke_message(struct ceph_connection *con, - struct ceph_msg *msg); + +extern void ceph_msg_revoke(struct ceph_msg *msg); +extern void ceph_msg_revoke_incoming(struct ceph_msg *msg); + extern void ceph_con_keepalive(struct ceph_connection *con); -extern struct ceph_connection *ceph_con_get(struct ceph_connection *con); -extern void ceph_con_put(struct ceph_connection *con); extern struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, bool can_fail); diff --git a/include/linux/ceph/mon_client.h b/include/linux/ceph/mon_client.h index 545f859..2113e38 100644 --- a/include/linux/ceph/mon_client.h +++ b/include/linux/ceph/mon_client.h @@ -70,7 +70,7 @@ struct ceph_mon_client { bool hunting; int cur_mon; /* last monitor i contacted */ unsigned long sub_sent, sub_renew_after; - struct ceph_connection *con; + struct ceph_connection con; bool have_fsid; /* pending generic requests */ diff --git a/include/linux/ceph/msgpool.h b/include/linux/ceph/msgpool.h index a362605f..09fa96b 100644 --- a/include/linux/ceph/msgpool.h +++ b/include/linux/ceph/msgpool.h @@ -11,10 +11,11 @@ struct ceph_msgpool { const char *name; mempool_t *pool; + int type; /* preallocated message type */ int front_len; /* preallocated payload size */ }; -extern int ceph_msgpool_init(struct ceph_msgpool *pool, +extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type, int front_len, int size, bool blocking, const char *name); extern void ceph_msgpool_destroy(struct ceph_msgpool *pool); diff --git a/include/linux/crush/crush.h b/include/linux/crush/crush.h index 7c47508..25baa28 100644 --- a/include/linux/crush/crush.h +++ b/include/linux/crush/crush.h @@ -154,6 +154,14 @@ struct crush_map { __s32 max_buckets; __u32 max_rules; __s32 max_devices; + + /* choose local retries before re-descent */ + __u32 choose_local_tries; + /* choose local attempts using a fallback permutation before + * re-descent */ + __u32 choose_local_fallback_tries; + /* choose attempts before giving up */ + __u32 choose_total_tries; }; diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index ba4323b..69e38db 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -17,6 +17,7 @@ #include <linux/string.h> +#include <linux/ceph/ceph_features.h> #include <linux/ceph/libceph.h> #include <linux/ceph/debugfs.h> #include <linux/ceph/decode.h> @@ -460,27 +461,23 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private, client->auth_err = 0; client->extra_mon_dispatch = NULL; - client->supported_features = CEPH_FEATURE_SUPPORTED_DEFAULT | + client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT | supported_features; - client->required_features = CEPH_FEATURE_REQUIRED_DEFAULT | + client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT | required_features; /* msgr */ if (ceph_test_opt(client, MYIP)) myaddr = &client->options->my_addr; - client->msgr = ceph_messenger_create(myaddr, - client->supported_features, - client->required_features); - if (IS_ERR(client->msgr)) { - err = PTR_ERR(client->msgr); - goto fail; - } - client->msgr->nocrc = ceph_test_opt(client, NOCRC); + ceph_messenger_init(&client->msgr, myaddr, + client->supported_features, + client->required_features, + ceph_test_opt(client, NOCRC)); /* subsystems */ err = ceph_monc_init(&client->monc, client); if (err < 0) - goto fail_msgr; + goto fail; err = ceph_osdc_init(&client->osdc, client); if (err < 0) goto fail_monc; @@ -489,8 +486,6 @@ struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private, fail_monc: ceph_monc_stop(&client->monc); -fail_msgr: - ceph_messenger_destroy(client->msgr); fail: kfree(client); return ERR_PTR(err); @@ -501,6 +496,8 @@ void ceph_destroy_client(struct ceph_client *client) { dout("destroy_client %p\n", client); + atomic_set(&client->msgr.stopping, 1); + /* unmount */ ceph_osdc_stop(&client->osdc); @@ -508,8 +505,6 @@ void ceph_destroy_client(struct ceph_client *client) ceph_debugfs_client_cleanup(client); - ceph_messenger_destroy(client->msgr); - ceph_destroy_options(client->options); kfree(client); diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c index d7edc24..35fce75 100644 --- a/net/ceph/crush/mapper.c +++ b/net/ceph/crush/mapper.c @@ -306,7 +306,6 @@ static int crush_choose(const struct crush_map *map, int item = 0; int itemtype; int collide, reject; - const unsigned int orig_tries = 5; /* attempts before we fall back to search */ dprintk("CHOOSE%s bucket %d x %d outpos %d numrep %d\n", recurse_to_leaf ? "_LEAF" : "", bucket->id, x, outpos, numrep); @@ -351,8 +350,9 @@ static int crush_choose(const struct crush_map *map, reject = 1; goto reject; } - if (flocal >= (in->size>>1) && - flocal > orig_tries) + if (map->choose_local_fallback_tries > 0 && + flocal >= (in->size>>1) && + flocal > map->choose_local_fallback_tries) item = bucket_perm_choose(in, x, r); else item = crush_bucket_choose(in, x, r); @@ -422,13 +422,14 @@ reject: ftotal++; flocal++; - if (collide && flocal < 3) + if (collide && flocal <= map->choose_local_tries) /* retry locally a few times */ retry_bucket = 1; - else if (flocal <= in->size + orig_tries) + else if (map->choose_local_fallback_tries > 0 && + flocal <= in->size + map->choose_local_fallback_tries) /* exhaustive bucket search */ retry_bucket = 1; - else if (ftotal < 20) + else if (ftotal <= map->choose_total_tries) /* then retry descent */ retry_descent = 1; else diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index 10255e8..b979675 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -29,6 +29,74 @@ * the sender. */ +/* + * We track the state of the socket on a given connection using + * values defined below. The transition to a new socket state is + * handled by a function which verifies we aren't coming from an + * unexpected state. + * + * -------- + * | NEW* | transient initial state + * -------- + * | con_sock_state_init() + * v + * ---------- + * | CLOSED | initialized, but no socket (and no + * ---------- TCP connection) + * ^ \ + * | \ con_sock_state_connecting() + * | ---------------------- + * | \ + * + con_sock_state_closed() \ + * |+--------------------------- \ + * | \ \ \ + * | ----------- \ \ + * | | CLOSING | socket event; \ \ + * | ----------- await close \ \ + * | ^ \ | + * | | \ | + * | + con_sock_state_closing() \ | + * | / \ | | + * | / --------------- | | + * | / \ v v + * | / -------------- + * | / -----------------| CONNECTING | socket created, TCP + * | | / -------------- connect initiated + * | | | con_sock_state_connected() + * | | v + * ------------- + * | CONNECTED | TCP connection established + * ------------- + * + * State values for ceph_connection->sock_state; NEW is assumed to be 0. + */ + +#define CON_SOCK_STATE_NEW 0 /* -> CLOSED */ +#define CON_SOCK_STATE_CLOSED 1 /* -> CONNECTING */ +#define CON_SOCK_STATE_CONNECTING 2 /* -> CONNECTED or -> CLOSING */ +#define CON_SOCK_STATE_CONNECTED 3 /* -> CLOSING or -> CLOSED */ +#define CON_SOCK_STATE_CLOSING 4 /* -> CLOSED */ + +/* + * connection states + */ +#define CON_STATE_CLOSED 1 /* -> PREOPEN */ +#define CON_STATE_PREOPEN 2 /* -> CONNECTING, CLOSED */ +#define CON_STATE_CONNECTING 3 /* -> NEGOTIATING, CLOSED */ +#define CON_STATE_NEGOTIATING 4 /* -> OPEN, CLOSED */ +#define CON_STATE_OPEN 5 /* -> STANDBY, CLOSED */ +#define CON_STATE_STANDBY 6 /* -> PREOPEN, CLOSED */ + +/* + * ceph_connection flag bits + */ +#define CON_FLAG_LOSSYTX 0 /* we can close channel or drop + * messages on errors */ +#define CON_FLAG_KEEPALIVE_PENDING 1 /* we need to send a keepalive */ +#define CON_FLAG_WRITE_PENDING 2 /* we have data ready to send */ +#define CON_FLAG_SOCK_CLOSED 3 /* socket state changed to closed */ +#define CON_FLAG_BACKOFF 4 /* need to retry queuing delayed work */ + /* static tag bytes (protocol control messages) */ static char tag_msg = CEPH_MSGR_TAG_MSG; static char tag_ack = CEPH_MSGR_TAG_ACK; @@ -147,72 +215,130 @@ void ceph_msgr_flush(void) } EXPORT_SYMBOL(ceph_msgr_flush); +/* Connection socket state transition functions */ + +static void con_sock_state_init(struct ceph_connection *con) +{ + int old_state; + + old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); + if (WARN_ON(old_state != CON_SOCK_STATE_NEW)) + printk("%s: unexpected old state %d\n", __func__, old_state); + dout("%s con %p sock %d -> %d\n", __func__, con, old_state, + CON_SOCK_STATE_CLOSED); +} + +static void con_sock_state_connecting(struct ceph_connection *con) +{ + int old_state; + + old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTING); + if (WARN_ON(old_state != CON_SOCK_STATE_CLOSED)) + printk("%s: unexpected old state %d\n", __func__, old_state); + dout("%s con %p sock %d -> %d\n", __func__, con, old_state, + CON_SOCK_STATE_CONNECTING); +} + +static void con_sock_state_connected(struct ceph_connection *con) +{ + int old_state; + + old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CONNECTED); + if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING)) + printk("%s: unexpected old state %d\n", __func__, old_state); + dout("%s con %p sock %d -> %d\n", __func__, con, old_state, + CON_SOCK_STATE_CONNECTED); +} + +static void con_sock_state_closing(struct ceph_connection *con) +{ + int old_state; + + old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSING); + if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTING && + old_state != CON_SOCK_STATE_CONNECTED && + old_state != CON_SOCK_STATE_CLOSING)) + printk("%s: unexpected old state %d\n", __func__, old_state); + dout("%s con %p sock %d -> %d\n", __func__, con, old_state, + CON_SOCK_STATE_CLOSING); +} + +static void con_sock_state_closed(struct ceph_connection *con) +{ + int old_state; + + old_state = atomic_xchg(&con->sock_state, CON_SOCK_STATE_CLOSED); + if (WARN_ON(old_state != CON_SOCK_STATE_CONNECTED && + old_state != CON_SOCK_STATE_CLOSING && + old_state != CON_SOCK_STATE_CONNECTING && + old_state != CON_SOCK_STATE_CLOSED)) + printk("%s: unexpected old state %d\n", __func__, old_state); + dout("%s con %p sock %d -> %d\n", __func__, con, old_state, + CON_SOCK_STATE_CLOSED); +} /* * socket callback functions */ /* data available on socket, or listen socket received a connect */ -static void ceph_data_ready(struct sock *sk, int count_unused) +static void ceph_sock_data_ready(struct sock *sk, int count_unused) { struct ceph_connection *con = sk->sk_user_data; + if (atomic_read(&con->msgr->stopping)) { + return; + } if (sk->sk_state != TCP_CLOSE_WAIT) { - dout("ceph_data_ready on %p state = %lu, queueing work\n", + dout("%s on %p state = %lu, queueing work\n", __func__, con, con->state); queue_con(con); } } /* socket has buffer space for writing */ -static void ceph_write_space(struct sock *sk) +static void ceph_sock_write_space(struct sock *sk) { struct ceph_connection *con = sk->sk_user_data; /* only queue to workqueue if there is data we want to write, * and there is sufficient space in the socket buffer to accept - * more data. clear SOCK_NOSPACE so that ceph_write_space() + * more data. clear SOCK_NOSPACE so that ceph_sock_write_space() * doesn't get called again until try_write() fills the socket * buffer. See net/ipv4/tcp_input.c:tcp_check_space() * and net/core/stream.c:sk_stream_write_space(). */ - if (test_bit(WRITE_PENDING, &con->state)) { + if (test_bit(CON_FLAG_WRITE_PENDING, &con->flags)) { if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) { - dout("ceph_write_space %p queueing write work\n", con); + dout("%s %p queueing write work\n", __func__, con); clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags); queue_con(con); } } else { - dout("ceph_write_space %p nothing to write\n", con); + dout("%s %p nothing to write\n", __func__, con); } } /* socket's state has changed */ -static void ceph_state_change(struct sock *sk) +static void ceph_sock_state_change(struct sock *sk) { struct ceph_connection *con = sk->sk_user_data; - dout("ceph_state_change %p state = %lu sk_state = %u\n", + dout("%s %p state = %lu sk_state = %u\n", __func__, con, con->state, sk->sk_state); - if (test_bit(CLOSED, &con->state)) - return; - switch (sk->sk_state) { case TCP_CLOSE: - dout("ceph_state_change TCP_CLOSE\n"); + dout("%s TCP_CLOSE\n", __func__); case TCP_CLOSE_WAIT: - dout("ceph_state_change TCP_CLOSE_WAIT\n"); - if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) { - if (test_bit(CONNECTING, &con->state)) - con->error_msg = "connection failed"; - else - con->error_msg = "socket closed"; - queue_con(con); - } + dout("%s TCP_CLOSE_WAIT\n", __func__); + con_sock_state_closing(con); + set_bit(CON_FLAG_SOCK_CLOSED, &con->flags); + queue_con(con); break; case TCP_ESTABLISHED: - dout("ceph_state_change TCP_ESTABLISHED\n"); + dout("%s TCP_ESTABLISHED\n", __func__); + con_sock_state_connected(con); queue_con(con); break; default: /* Everything else is uninteresting */ @@ -228,9 +354,9 @@ static void set_sock_callbacks(struct socket *sock, { struct sock *sk = sock->sk; sk->sk_user_data = con; - sk->sk_data_ready = ceph_data_ready; - sk->sk_write_space = ceph_write_space; - sk->sk_state_change = ceph_state_change; + sk->sk_data_ready = ceph_sock_data_ready; + sk->sk_write_space = ceph_sock_write_space; + sk->sk_state_change = ceph_sock_state_change; } @@ -262,6 +388,7 @@ static int ceph_tcp_connect(struct ceph_connection *con) dout("connect %s\n", ceph_pr_addr(&con->peer_addr.in_addr)); + con_sock_state_connecting(con); ret = sock->ops->connect(sock, (struct sockaddr *)paddr, sizeof(*paddr), O_NONBLOCK); if (ret == -EINPROGRESS) { @@ -277,7 +404,6 @@ static int ceph_tcp_connect(struct ceph_connection *con) return ret; } con->sock = sock; - return 0; } @@ -333,16 +459,24 @@ static int ceph_tcp_sendpage(struct socket *sock, struct page *page, */ static int con_close_socket(struct ceph_connection *con) { - int rc; + int rc = 0; dout("con_close_socket on %p sock %p\n", con, con->sock); - if (!con->sock) - return 0; - set_bit(SOCK_CLOSED, &con->state); - rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); - sock_release(con->sock); - con->sock = NULL; - clear_bit(SOCK_CLOSED, &con->state); + if (con->sock) { + rc = con->sock->ops->shutdown(con->sock, SHUT_RDWR); + sock_release(con->sock); + con->sock = NULL; + } + + /* + * Forcibly clear the SOCK_CLOSED flag. It gets set + * independent of the connection mutex, and we could have + * received a socket close event before we had the chance to + * shut the socket down. + */ + clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags); + + con_sock_state_closed(con); return rc; } @@ -353,6 +487,10 @@ static int con_close_socket(struct ceph_connection *con) static void ceph_msg_remove(struct ceph_msg *msg) { list_del_init(&msg->list_head); + BUG_ON(msg->con == NULL); + msg->con->ops->put(msg->con); + msg->con = NULL; + ceph_msg_put(msg); } static void ceph_msg_remove_list(struct list_head *head) @@ -372,8 +510,11 @@ static void reset_connection(struct ceph_connection *con) ceph_msg_remove_list(&con->out_sent); if (con->in_msg) { + BUG_ON(con->in_msg->con != con); + con->in_msg->con = NULL; ceph_msg_put(con->in_msg); con->in_msg = NULL; + con->ops->put(con); } con->connect_seq = 0; @@ -391,32 +532,44 @@ static void reset_connection(struct ceph_connection *con) */ void ceph_con_close(struct ceph_connection *con) { + mutex_lock(&con->mutex); dout("con_close %p peer %s\n", con, ceph_pr_addr(&con->peer_addr.in_addr)); - set_bit(CLOSED, &con->state); /* in case there's queued work */ - clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */ - clear_bit(LOSSYTX, &con->state); /* so we retry next connect */ - clear_bit(KEEPALIVE_PENDING, &con->state); - clear_bit(WRITE_PENDING, &con->state); - mutex_lock(&con->mutex); + con->state = CON_STATE_CLOSED; + + clear_bit(CON_FLAG_LOSSYTX, &con->flags); /* so we retry next connect */ + clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); + clear_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags); + clear_bit(CON_FLAG_BACKOFF, &con->flags); + reset_connection(con); con->peer_global_seq = 0; cancel_delayed_work(&con->work); + con_close_socket(con); mutex_unlock(&con->mutex); - queue_con(con); } EXPORT_SYMBOL(ceph_con_close); /* * Reopen a closed connection, with a new peer address. */ -void ceph_con_open(struct ceph_connection *con, struct ceph_entity_addr *addr) +void ceph_con_open(struct ceph_connection *con, + __u8 entity_type, __u64 entity_num, + struct ceph_entity_addr *addr) { + mutex_lock(&con->mutex); dout("con_open %p %s\n", con, ceph_pr_addr(&addr->in_addr)); - set_bit(OPENING, &con->state); - clear_bit(CLOSED, &con->state); + + BUG_ON(con->state != CON_STATE_CLOSED); + con->state = CON_STATE_PREOPEN; + + con->peer_name.type = (__u8) entity_type; + con->peer_name.num = cpu_to_le64(entity_num); + memcpy(&con->peer_addr, addr, sizeof(*addr)); con->delay = 0; /* reset backoff memory */ + mutex_unlock(&con->mutex); queue_con(con); } EXPORT_SYMBOL(ceph_con_open); @@ -430,42 +583,26 @@ bool ceph_con_opened(struct ceph_connection *con) } /* - * generic get/put - */ -struct ceph_connection *ceph_con_get(struct ceph_connection *con) -{ - int nref = __atomic_add_unless(&con->nref, 1, 0); - - dout("con_get %p nref = %d -> %d\n", con, nref, nref + 1); - - return nref ? con : NULL; -} - -void ceph_con_put(struct ceph_connection *con) -{ - int nref = atomic_dec_return(&con->nref); - - BUG_ON(nref < 0); - if (nref == 0) { - BUG_ON(con->sock); - kfree(con); - } - dout("con_put %p nref = %d -> %d\n", con, nref + 1, nref); -} - -/* * initialize a new connection. */ -void ceph_con_init(struct ceph_messenger *msgr, struct ceph_connection *con) +void ceph_con_init(struct ceph_connection *con, void *private, + const struct ceph_connection_operations *ops, + struct ceph_messenger *msgr) { dout("con_init %p\n", con); memset(con, 0, sizeof(*con)); - atomic_set(&con->nref, 1); + con->private = private; + con->ops = ops; con->msgr = msgr; + + con_sock_state_init(con); + mutex_init(&con->mutex); INIT_LIST_HEAD(&con->out_queue); INIT_LIST_HEAD(&con->out_sent); INIT_DELAYED_WORK(&con->work, con_work); + + con->state = CON_STATE_CLOSED; } EXPORT_SYMBOL(ceph_con_init); @@ -486,14 +623,14 @@ static u32 get_global_seq(struct ceph_messenger *msgr, u32 gt) return ret; } -static void ceph_con_out_kvec_reset(struct ceph_connection *con) +static void con_out_kvec_reset(struct ceph_connection *con) { con->out_kvec_left = 0; con->out_kvec_bytes = 0; con->out_kvec_cur = &con->out_kvec[0]; } -static void ceph_con_out_kvec_add(struct ceph_connection *con, +static void con_out_kvec_add(struct ceph_connection *con, size_t size, void *data) { int index; @@ -507,6 +644,53 @@ static void ceph_con_out_kvec_add(struct ceph_connection *con, con->out_kvec_bytes += size; } +#ifdef CONFIG_BLOCK +static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) +{ + if (!bio) { + *iter = NULL; + *seg = 0; + return; + } + *iter = bio; + *seg = bio->bi_idx; +} + +static void iter_bio_next(struct bio **bio_iter, int *seg) +{ + if (*bio_iter == NULL) + return; + + BUG_ON(*seg >= (*bio_iter)->bi_vcnt); + + (*seg)++; + if (*seg == (*bio_iter)->bi_vcnt) + init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); +} +#endif + +static void prepare_write_message_data(struct ceph_connection *con) +{ + struct ceph_msg *msg = con->out_msg; + + BUG_ON(!msg); + BUG_ON(!msg->hdr.data_len); + + /* initialize page iterator */ + con->out_msg_pos.page = 0; + if (msg->pages) + con->out_msg_pos.page_pos = msg->page_alignment; + else + con->out_msg_pos.page_pos = 0; +#ifdef CONFIG_BLOCK + if (msg->bio) + init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); +#endif + con->out_msg_pos.data_pos = 0; + con->out_msg_pos.did_page_crc = false; + con->out_more = 1; /* data + footer will follow */ +} + /* * Prepare footer for currently outgoing message, and finish things * off. Assumes out_kvec* are already valid.. we just add on to the end. @@ -516,6 +700,8 @@ static void prepare_write_message_footer(struct ceph_connection *con) struct ceph_msg *m = con->out_msg; int v = con->out_kvec_left; + m->footer.flags |= CEPH_MSG_FOOTER_COMPLETE; + dout("prepare_write_message_footer %p\n", con); con->out_kvec_is_msg = true; con->out_kvec[v].iov_base = &m->footer; @@ -534,7 +720,7 @@ static void prepare_write_message(struct ceph_connection *con) struct ceph_msg *m; u32 crc; - ceph_con_out_kvec_reset(con); + con_out_kvec_reset(con); con->out_kvec_is_msg = true; con->out_msg_done = false; @@ -542,14 +728,16 @@ static void prepare_write_message(struct ceph_connection *con) * TCP packet that's a good thing. */ if (con->in_seq > con->in_seq_acked) { con->in_seq_acked = con->in_seq; - ceph_con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); + con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); con->out_temp_ack = cpu_to_le64(con->in_seq_acked); - ceph_con_out_kvec_add(con, sizeof (con->out_temp_ack), + con_out_kvec_add(con, sizeof (con->out_temp_ack), &con->out_temp_ack); } + BUG_ON(list_empty(&con->out_queue)); m = list_first_entry(&con->out_queue, struct ceph_msg, list_head); con->out_msg = m; + BUG_ON(m->con != con); /* put message on sent list */ ceph_msg_get(m); @@ -576,18 +764,18 @@ static void prepare_write_message(struct ceph_connection *con) BUG_ON(le32_to_cpu(m->hdr.front_len) != m->front.iov_len); /* tag + hdr + front + middle */ - ceph_con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); - ceph_con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); - ceph_con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); + con_out_kvec_add(con, sizeof (tag_msg), &tag_msg); + con_out_kvec_add(con, sizeof (m->hdr), &m->hdr); + con_out_kvec_add(con, m->front.iov_len, m->front.iov_base); if (m->middle) - ceph_con_out_kvec_add(con, m->middle->vec.iov_len, + con_out_kvec_add(con, m->middle->vec.iov_len, m->middle->vec.iov_base); /* fill in crc (except data pages), footer */ crc = crc32c(0, &m->hdr, offsetof(struct ceph_msg_header, crc)); con->out_msg->hdr.crc = cpu_to_le32(crc); - con->out_msg->footer.flags = CEPH_MSG_FOOTER_COMPLETE; + con->out_msg->footer.flags = 0; crc = crc32c(0, m->front.iov_base, m->front.iov_len); con->out_msg->footer.front_crc = cpu_to_le32(crc); @@ -597,28 +785,19 @@ static void prepare_write_message(struct ceph_connection *con) con->out_msg->footer.middle_crc = cpu_to_le32(crc); } else con->out_msg->footer.middle_crc = 0; - con->out_msg->footer.data_crc = 0; - dout("prepare_write_message front_crc %u data_crc %u\n", + dout("%s front_crc %u middle_crc %u\n", __func__, le32_to_cpu(con->out_msg->footer.front_crc), le32_to_cpu(con->out_msg->footer.middle_crc)); /* is there a data payload? */ - if (le32_to_cpu(m->hdr.data_len) > 0) { - /* initialize page iterator */ - con->out_msg_pos.page = 0; - if (m->pages) - con->out_msg_pos.page_pos = m->page_alignment; - else - con->out_msg_pos.page_pos = 0; - con->out_msg_pos.data_pos = 0; - con->out_msg_pos.did_page_crc = false; - con->out_more = 1; /* data + footer will follow */ - } else { + con->out_msg->footer.data_crc = 0; + if (m->hdr.data_len) + prepare_write_message_data(con); + else /* no, queue up footer too and be done */ prepare_write_message_footer(con); - } - set_bit(WRITE_PENDING, &con->state); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -630,16 +809,16 @@ static void prepare_write_ack(struct ceph_connection *con) con->in_seq_acked, con->in_seq); con->in_seq_acked = con->in_seq; - ceph_con_out_kvec_reset(con); + con_out_kvec_reset(con); - ceph_con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); + con_out_kvec_add(con, sizeof (tag_ack), &tag_ack); con->out_temp_ack = cpu_to_le64(con->in_seq_acked); - ceph_con_out_kvec_add(con, sizeof (con->out_temp_ack), + con_out_kvec_add(con, sizeof (con->out_temp_ack), &con->out_temp_ack); con->out_more = 1; /* more will follow.. eventually.. */ - set_bit(WRITE_PENDING, &con->state); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -648,9 +827,9 @@ static void prepare_write_ack(struct ceph_connection *con) static void prepare_write_keepalive(struct ceph_connection *con) { dout("prepare_write_keepalive %p\n", con); - ceph_con_out_kvec_reset(con); - ceph_con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); - set_bit(WRITE_PENDING, &con->state); + con_out_kvec_reset(con); + con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } /* @@ -665,27 +844,21 @@ static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection if (!con->ops->get_authorizer) { con->out_connect.authorizer_protocol = CEPH_AUTH_UNKNOWN; con->out_connect.authorizer_len = 0; - return NULL; } /* Can't hold the mutex while getting authorizer */ - mutex_unlock(&con->mutex); - auth = con->ops->get_authorizer(con, auth_proto, con->auth_retry); - mutex_lock(&con->mutex); if (IS_ERR(auth)) return auth; - if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->state)) + if (con->state != CON_STATE_NEGOTIATING) return ERR_PTR(-EAGAIN); con->auth_reply_buf = auth->authorizer_reply_buf; con->auth_reply_buf_len = auth->authorizer_reply_buf_len; - - return auth; } @@ -694,12 +867,12 @@ static struct ceph_auth_handshake *get_connect_authorizer(struct ceph_connection */ static void prepare_write_banner(struct ceph_connection *con) { - ceph_con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); - ceph_con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), + con_out_kvec_add(con, strlen(CEPH_BANNER), CEPH_BANNER); + con_out_kvec_add(con, sizeof (con->msgr->my_enc_addr), &con->msgr->my_enc_addr); con->out_more = 0; - set_bit(WRITE_PENDING, &con->state); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); } static int prepare_write_connect(struct ceph_connection *con) @@ -742,14 +915,15 @@ static int prepare_write_connect(struct ceph_connection *con) con->out_connect.authorizer_len = auth ? cpu_to_le32(auth->authorizer_buf_len) : 0; - ceph_con_out_kvec_add(con, sizeof (con->out_connect), + con_out_kvec_reset(con); + con_out_kvec_add(con, sizeof (con->out_connect), &con->out_connect); if (auth && auth->authorizer_buf_len) - ceph_con_out_kvec_add(con, auth->authorizer_buf_len, + con_out_kvec_add(con, auth->authorizer_buf_len, auth->authorizer_buf); con->out_more = 0; - set_bit(WRITE_PENDING, &con->state); + set_bit(CON_FLAG_WRITE_PENDING, &con->flags); return 0; } @@ -797,30 +971,34 @@ out: return ret; /* done! */ } -#ifdef CONFIG_BLOCK -static void init_bio_iter(struct bio *bio, struct bio **iter, int *seg) +static void out_msg_pos_next(struct ceph_connection *con, struct page *page, + size_t len, size_t sent, bool in_trail) { - if (!bio) { - *iter = NULL; - *seg = 0; - return; - } - *iter = bio; - *seg = bio->bi_idx; -} + struct ceph_msg *msg = con->out_msg; -static void iter_bio_next(struct bio **bio_iter, int *seg) -{ - if (*bio_iter == NULL) - return; + BUG_ON(!msg); + BUG_ON(!sent); - BUG_ON(*seg >= (*bio_iter)->bi_vcnt); + con->out_msg_pos.data_pos += sent; + con->out_msg_pos.page_pos += sent; + if (sent < len) + return; - (*seg)++; - if (*seg == (*bio_iter)->bi_vcnt) - init_bio_iter((*bio_iter)->bi_next, bio_iter, seg); -} + BUG_ON(sent != len); + con->out_msg_pos.page_pos = 0; + con->out_msg_pos.page++; + con->out_msg_pos.did_page_crc = false; + if (in_trail) + list_move_tail(&page->lru, + &msg->trail->head); + else if (msg->pagelist) + list_move_tail(&page->lru, + &msg->pagelist->head); +#ifdef CONFIG_BLOCK + else if (msg->bio) + iter_bio_next(&msg->bio_iter, &msg->bio_seg); #endif +} /* * Write as much message data payload as we can. If we finish, queue @@ -837,41 +1015,36 @@ static int write_partial_msg_pages(struct ceph_connection *con) bool do_datacrc = !con->msgr->nocrc; int ret; int total_max_write; - int in_trail = 0; - size_t trail_len = (msg->trail ? msg->trail->length : 0); + bool in_trail = false; + const size_t trail_len = (msg->trail ? msg->trail->length : 0); + const size_t trail_off = data_len - trail_len; dout("write_partial_msg_pages %p msg %p page %d/%d offset %d\n", - con, con->out_msg, con->out_msg_pos.page, con->out_msg->nr_pages, + con, msg, con->out_msg_pos.page, msg->nr_pages, con->out_msg_pos.page_pos); -#ifdef CONFIG_BLOCK - if (msg->bio && !msg->bio_iter) - init_bio_iter(msg->bio, &msg->bio_iter, &msg->bio_seg); -#endif - + /* + * Iterate through each page that contains data to be + * written, and send as much as possible for each. + * + * If we are calculating the data crc (the default), we will + * need to map the page. If we have no pages, they have + * been revoked, so use the zero page. + */ while (data_len > con->out_msg_pos.data_pos) { struct page *page = NULL; int max_write = PAGE_SIZE; int bio_offset = 0; - total_max_write = data_len - trail_len - - con->out_msg_pos.data_pos; - - /* - * if we are calculating the data crc (the default), we need - * to map the page. if our pages[] has been revoked, use the - * zero page. - */ - - /* have we reached the trail part of the data? */ - if (con->out_msg_pos.data_pos >= data_len - trail_len) { - in_trail = 1; + in_trail = in_trail || con->out_msg_pos.data_pos >= trail_off; + if (!in_trail) + total_max_write = trail_off - con->out_msg_pos.data_pos; + if (in_trail) { total_max_write = data_len - con->out_msg_pos.data_pos; page = list_first_entry(&msg->trail->head, struct page, lru); - max_write = PAGE_SIZE; } else if (msg->pages) { page = msg->pages[con->out_msg_pos.page]; } else if (msg->pagelist) { @@ -894,15 +1067,14 @@ static int write_partial_msg_pages(struct ceph_connection *con) if (do_datacrc && !con->out_msg_pos.did_page_crc) { void *base; - u32 crc; - u32 tmpcrc = le32_to_cpu(con->out_msg->footer.data_crc); + u32 crc = le32_to_cpu(msg->footer.data_crc); char *kaddr; kaddr = kmap(page); BUG_ON(kaddr == NULL); base = kaddr + con->out_msg_pos.page_pos + bio_offset; - crc = crc32c(tmpcrc, base, len); - con->out_msg->footer.data_crc = cpu_to_le32(crc); + crc = crc32c(crc, base, len); + msg->footer.data_crc = cpu_to_le32(crc); con->out_msg_pos.did_page_crc = true; } ret = ceph_tcp_sendpage(con->sock, page, @@ -915,31 +1087,15 @@ static int write_partial_msg_pages(struct ceph_connection *con) if (ret <= 0) goto out; - con->out_msg_pos.data_pos += ret; - con->out_msg_pos.page_pos += ret; - if (ret == len) { - con->out_msg_pos.page_pos = 0; - con->out_msg_pos.page++; - con->out_msg_pos.did_page_crc = false; - if (in_trail) - list_move_tail(&page->lru, - &msg->trail->head); - else if (msg->pagelist) - list_move_tail(&page->lru, - &msg->pagelist->head); -#ifdef CONFIG_BLOCK - else if (msg->bio) - iter_bio_next(&msg->bio_iter, &msg->bio_seg); -#endif - } + out_msg_pos_next(con, page, len, (size_t) ret, in_trail); } dout("write_partial_msg_pages %p msg %p done\n", con, msg); /* prepare and queue up footer, too */ if (!do_datacrc) - con->out_msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; - ceph_con_out_kvec_reset(con); + msg->footer.flags |= CEPH_MSG_FOOTER_NOCRC; + con_out_kvec_reset(con); prepare_write_message_footer(con); ret = 1; out: @@ -1351,20 +1507,14 @@ static int process_banner(struct ceph_connection *con) ceph_pr_addr(&con->msgr->inst.addr.in_addr)); } - set_bit(NEGOTIATING, &con->state); - prepare_read_connect(con); return 0; } static void fail_protocol(struct ceph_connection *con) { reset_connection(con); - set_bit(CLOSED, &con->state); /* in case there's queued work */ - - mutex_unlock(&con->mutex); - if (con->ops->bad_proto) - con->ops->bad_proto(con); - mutex_lock(&con->mutex); + BUG_ON(con->state != CON_STATE_NEGOTIATING); + con->state = CON_STATE_CLOSED; } static int process_connect(struct ceph_connection *con) @@ -1407,7 +1557,6 @@ static int process_connect(struct ceph_connection *con) return -1; } con->auth_retry = 1; - ceph_con_out_kvec_reset(con); ret = prepare_write_connect(con); if (ret < 0) return ret; @@ -1428,7 +1577,6 @@ static int process_connect(struct ceph_connection *con) ENTITY_NAME(con->peer_name), ceph_pr_addr(&con->peer_addr.in_addr)); reset_connection(con); - ceph_con_out_kvec_reset(con); ret = prepare_write_connect(con); if (ret < 0) return ret; @@ -1440,8 +1588,7 @@ static int process_connect(struct ceph_connection *con) if (con->ops->peer_reset) con->ops->peer_reset(con); mutex_lock(&con->mutex); - if (test_bit(CLOSED, &con->state) || - test_bit(OPENING, &con->state)) + if (con->state != CON_STATE_NEGOTIATING) return -EAGAIN; break; @@ -1454,7 +1601,6 @@ static int process_connect(struct ceph_connection *con) le32_to_cpu(con->out_connect.connect_seq), le32_to_cpu(con->in_reply.connect_seq)); con->connect_seq = le32_to_cpu(con->in_reply.connect_seq); - ceph_con_out_kvec_reset(con); ret = prepare_write_connect(con); if (ret < 0) return ret; @@ -1471,7 +1617,6 @@ static int process_connect(struct ceph_connection *con) le32_to_cpu(con->in_reply.global_seq)); get_global_seq(con->msgr, le32_to_cpu(con->in_reply.global_seq)); - ceph_con_out_kvec_reset(con); ret = prepare_write_connect(con); if (ret < 0) return ret; @@ -1489,7 +1634,10 @@ static int process_connect(struct ceph_connection *con) fail_protocol(con); return -1; } - clear_bit(CONNECTING, &con->state); + + BUG_ON(con->state != CON_STATE_NEGOTIATING); + con->state = CON_STATE_OPEN; + con->peer_global_seq = le32_to_cpu(con->in_reply.global_seq); con->connect_seq++; con->peer_features = server_feat; @@ -1501,7 +1649,9 @@ static int process_connect(struct ceph_connection *con) le32_to_cpu(con->in_reply.connect_seq)); if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY) - set_bit(LOSSYTX, &con->state); + set_bit(CON_FLAG_LOSSYTX, &con->flags); + + con->delay = 0; /* reset backoff memory */ prepare_read_tag(con); break; @@ -1587,10 +1737,7 @@ static int read_partial_message_section(struct ceph_connection *con, return 1; } -static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, - struct ceph_msg_header *hdr, - int *skip); - +static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip); static int read_partial_message_pages(struct ceph_connection *con, struct page **pages, @@ -1633,9 +1780,6 @@ static int read_partial_message_bio(struct ceph_connection *con, void *p; int ret, left; - if (IS_ERR(bv)) - return PTR_ERR(bv); - left = min((int)(data_len - con->in_msg_pos.data_pos), (int)(bv->bv_len - con->in_msg_pos.page_pos)); @@ -1672,7 +1816,6 @@ static int read_partial_message(struct ceph_connection *con) int ret; unsigned int front_len, middle_len, data_len; bool do_datacrc = !con->msgr->nocrc; - int skip; u64 seq; u32 crc; @@ -1723,10 +1866,13 @@ static int read_partial_message(struct ceph_connection *con) /* allocate message? */ if (!con->in_msg) { + int skip = 0; + dout("got hdr type %d front %d data %d\n", con->in_hdr.type, con->in_hdr.front_len, con->in_hdr.data_len); - skip = 0; - con->in_msg = ceph_alloc_msg(con, &con->in_hdr, &skip); + ret = ceph_con_in_msg_alloc(con, &skip); + if (ret < 0) + return ret; if (skip) { /* skip this message */ dout("alloc_msg said skip message\n"); @@ -1737,11 +1883,9 @@ static int read_partial_message(struct ceph_connection *con) con->in_seq++; return 0; } - if (!con->in_msg) { - con->error_msg = - "error allocating memory for incoming message"; - return -ENOMEM; - } + + BUG_ON(!con->in_msg); + BUG_ON(con->in_msg->con != con); m = con->in_msg; m->front.iov_len = 0; /* haven't read it yet */ if (m->middle) @@ -1753,6 +1897,11 @@ static int read_partial_message(struct ceph_connection *con) else con->in_msg_pos.page_pos = 0; con->in_msg_pos.data_pos = 0; + +#ifdef CONFIG_BLOCK + if (m->bio) + init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); +#endif } /* front */ @@ -1769,10 +1918,6 @@ static int read_partial_message(struct ceph_connection *con) if (ret <= 0) return ret; } -#ifdef CONFIG_BLOCK - if (m->bio && !m->bio_iter) - init_bio_iter(m->bio, &m->bio_iter, &m->bio_seg); -#endif /* (page) data */ while (con->in_msg_pos.data_pos < data_len) { @@ -1783,7 +1928,7 @@ static int read_partial_message(struct ceph_connection *con) return ret; #ifdef CONFIG_BLOCK } else if (m->bio) { - + BUG_ON(!m->bio_iter); ret = read_partial_message_bio(con, &m->bio_iter, &m->bio_seg, data_len, do_datacrc); @@ -1837,8 +1982,11 @@ static void process_message(struct ceph_connection *con) { struct ceph_msg *msg; + BUG_ON(con->in_msg->con != con); + con->in_msg->con = NULL; msg = con->in_msg; con->in_msg = NULL; + con->ops->put(con); /* if first message, set peer_name */ if (con->peer_name.type == 0) @@ -1858,7 +2006,6 @@ static void process_message(struct ceph_connection *con) con->ops->dispatch(con, msg); mutex_lock(&con->mutex); - prepare_read_tag(con); } @@ -1870,22 +2017,19 @@ static int try_write(struct ceph_connection *con) { int ret = 1; - dout("try_write start %p state %lu nref %d\n", con, con->state, - atomic_read(&con->nref)); + dout("try_write start %p state %lu\n", con, con->state); more: dout("try_write out_kvec_bytes %d\n", con->out_kvec_bytes); /* open the socket first? */ - if (con->sock == NULL) { - ceph_con_out_kvec_reset(con); + if (con->state == CON_STATE_PREOPEN) { + BUG_ON(con->sock); + con->state = CON_STATE_CONNECTING; + + con_out_kvec_reset(con); prepare_write_banner(con); - ret = prepare_write_connect(con); - if (ret < 0) - goto out; prepare_read_banner(con); - set_bit(CONNECTING, &con->state); - clear_bit(NEGOTIATING, &con->state); BUG_ON(con->in_msg); con->in_tag = CEPH_MSGR_TAG_READY; @@ -1932,7 +2076,7 @@ more_kvec: } do_next: - if (!test_bit(CONNECTING, &con->state)) { + if (con->state == CON_STATE_OPEN) { /* is anything else pending? */ if (!list_empty(&con->out_queue)) { prepare_write_message(con); @@ -1942,14 +2086,15 @@ do_next: prepare_write_ack(con); goto more; } - if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) { + if (test_and_clear_bit(CON_FLAG_KEEPALIVE_PENDING, + &con->flags)) { prepare_write_keepalive(con); goto more; } } /* Nothing to do! */ - clear_bit(WRITE_PENDING, &con->state); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); dout("try_write nothing else to write.\n"); ret = 0; out: @@ -1966,38 +2111,42 @@ static int try_read(struct ceph_connection *con) { int ret = -1; - if (!con->sock) - return 0; - - if (test_bit(STANDBY, &con->state)) +more: + dout("try_read start on %p state %lu\n", con, con->state); + if (con->state != CON_STATE_CONNECTING && + con->state != CON_STATE_NEGOTIATING && + con->state != CON_STATE_OPEN) return 0; - dout("try_read start on %p\n", con); + BUG_ON(!con->sock); -more: dout("try_read tag %d in_base_pos %d\n", (int)con->in_tag, con->in_base_pos); - /* - * process_connect and process_message drop and re-take - * con->mutex. make sure we handle a racing close or reopen. - */ - if (test_bit(CLOSED, &con->state) || - test_bit(OPENING, &con->state)) { - ret = -EAGAIN; + if (con->state == CON_STATE_CONNECTING) { + dout("try_read connecting\n"); + ret = read_partial_banner(con); + if (ret <= 0) + goto out; + ret = process_banner(con); + if (ret < 0) + goto out; + + BUG_ON(con->state != CON_STATE_CONNECTING); + con->state = CON_STATE_NEGOTIATING; + + /* Banner is good, exchange connection info */ + ret = prepare_write_connect(con); + if (ret < 0) + goto out; + prepare_read_connect(con); + + /* Send connection info before awaiting response */ goto out; } - if (test_bit(CONNECTING, &con->state)) { - if (!test_bit(NEGOTIATING, &con->state)) { - dout("try_read connecting\n"); - ret = read_partial_banner(con); - if (ret <= 0) - goto out; - ret = process_banner(con); - if (ret < 0) - goto out; - } + if (con->state == CON_STATE_NEGOTIATING) { + dout("try_read negotiating\n"); ret = read_partial_connect(con); if (ret <= 0) goto out; @@ -2007,6 +2156,8 @@ more: goto more; } + BUG_ON(con->state != CON_STATE_OPEN); + if (con->in_base_pos < 0) { /* * skipping + discarding content. @@ -2040,7 +2191,8 @@ more: prepare_read_ack(con); break; case CEPH_MSGR_TAG_CLOSE: - set_bit(CLOSED, &con->state); /* fixme */ + con_close_socket(con); + con->state = CON_STATE_CLOSED; goto out; default: goto bad_tag; @@ -2063,6 +2215,8 @@ more: if (con->in_tag == CEPH_MSGR_TAG_READY) goto more; process_message(con); + if (con->state == CON_STATE_OPEN) + prepare_read_tag(con); goto more; } if (con->in_tag == CEPH_MSGR_TAG_ACK) { @@ -2091,12 +2245,6 @@ bad_tag: */ static void queue_con(struct ceph_connection *con) { - if (test_bit(DEAD, &con->state)) { - dout("queue_con %p ignoring: DEAD\n", - con); - return; - } - if (!con->ops->get(con)) { dout("queue_con %p ref count 0\n", con); return; @@ -2121,7 +2269,26 @@ static void con_work(struct work_struct *work) mutex_lock(&con->mutex); restart: - if (test_and_clear_bit(BACKOFF, &con->state)) { + if (test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags)) { + switch (con->state) { + case CON_STATE_CONNECTING: + con->error_msg = "connection failed"; + break; + case CON_STATE_NEGOTIATING: + con->error_msg = "negotiation failed"; + break; + case CON_STATE_OPEN: + con->error_msg = "socket closed"; + break; + default: + dout("unrecognized con state %d\n", (int)con->state); + con->error_msg = "unrecognized con state"; + BUG(); + } + goto fault; + } + + if (test_and_clear_bit(CON_FLAG_BACKOFF, &con->flags)) { dout("con_work %p backing off\n", con); if (queue_delayed_work(ceph_msgr_wq, &con->work, round_jiffies_relative(con->delay))) { @@ -2135,35 +2302,35 @@ restart: } } - if (test_bit(STANDBY, &con->state)) { + if (con->state == CON_STATE_STANDBY) { dout("con_work %p STANDBY\n", con); goto done; } - if (test_bit(CLOSED, &con->state)) { /* e.g. if we are replaced */ - dout("con_work CLOSED\n"); - con_close_socket(con); + if (con->state == CON_STATE_CLOSED) { + dout("con_work %p CLOSED\n", con); + BUG_ON(con->sock); goto done; } - if (test_and_clear_bit(OPENING, &con->state)) { - /* reopen w/ new peer */ + if (con->state == CON_STATE_PREOPEN) { dout("con_work OPENING\n"); - con_close_socket(con); + BUG_ON(con->sock); } - if (test_and_clear_bit(SOCK_CLOSED, &con->state)) - goto fault; - ret = try_read(con); if (ret == -EAGAIN) goto restart; - if (ret < 0) + if (ret < 0) { + con->error_msg = "socket error on read"; goto fault; + } ret = try_write(con); if (ret == -EAGAIN) goto restart; - if (ret < 0) + if (ret < 0) { + con->error_msg = "socket error on write"; goto fault; + } done: mutex_unlock(&con->mutex); @@ -2172,7 +2339,6 @@ done_unlocked: return; fault: - mutex_unlock(&con->mutex); ceph_fault(con); /* error/fault path */ goto done_unlocked; } @@ -2183,26 +2349,31 @@ fault: * exponential backoff */ static void ceph_fault(struct ceph_connection *con) + __releases(con->mutex) { pr_err("%s%lld %s %s\n", ENTITY_NAME(con->peer_name), ceph_pr_addr(&con->peer_addr.in_addr), con->error_msg); dout("fault %p state %lu to peer %s\n", con, con->state, ceph_pr_addr(&con->peer_addr.in_addr)); - if (test_bit(LOSSYTX, &con->state)) { - dout("fault on LOSSYTX channel\n"); - goto out; - } - - mutex_lock(&con->mutex); - if (test_bit(CLOSED, &con->state)) - goto out_unlock; + BUG_ON(con->state != CON_STATE_CONNECTING && + con->state != CON_STATE_NEGOTIATING && + con->state != CON_STATE_OPEN); con_close_socket(con); + if (test_bit(CON_FLAG_LOSSYTX, &con->flags)) { + dout("fault on LOSSYTX channel, marking CLOSED\n"); + con->state = CON_STATE_CLOSED; + goto out_unlock; + } + if (con->in_msg) { + BUG_ON(con->in_msg->con != con); + con->in_msg->con = NULL; ceph_msg_put(con->in_msg); con->in_msg = NULL; + con->ops->put(con); } /* Requeue anything that hasn't been acked */ @@ -2211,12 +2382,13 @@ static void ceph_fault(struct ceph_connection *con) /* If there are no messages queued or keepalive pending, place * the connection in a STANDBY state */ if (list_empty(&con->out_queue) && - !test_bit(KEEPALIVE_PENDING, &con->state)) { + !test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)) { dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con); - clear_bit(WRITE_PENDING, &con->state); - set_bit(STANDBY, &con->state); + clear_bit(CON_FLAG_WRITE_PENDING, &con->flags); + con->state = CON_STATE_STANDBY; } else { /* retry after a delay. */ + con->state = CON_STATE_PREOPEN; if (con->delay == 0) con->delay = BASE_DELAY_INTERVAL; else if (con->delay < MAX_DELAY_INTERVAL) @@ -2237,13 +2409,12 @@ static void ceph_fault(struct ceph_connection *con) * that when con_work restarts we schedule the * delay then. */ - set_bit(BACKOFF, &con->state); + set_bit(CON_FLAG_BACKOFF, &con->flags); } } out_unlock: mutex_unlock(&con->mutex); -out: /* * in case we faulted due to authentication, invalidate our * current tickets so that we can get new ones. @@ -2260,18 +2431,14 @@ out: /* - * create a new messenger instance + * initialize a new messenger instance */ -struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr, - u32 supported_features, - u32 required_features) +void ceph_messenger_init(struct ceph_messenger *msgr, + struct ceph_entity_addr *myaddr, + u32 supported_features, + u32 required_features, + bool nocrc) { - struct ceph_messenger *msgr; - - msgr = kzalloc(sizeof(*msgr), GFP_KERNEL); - if (msgr == NULL) - return ERR_PTR(-ENOMEM); - msgr->supported_features = supported_features; msgr->required_features = required_features; @@ -2284,30 +2451,23 @@ struct ceph_messenger *ceph_messenger_create(struct ceph_entity_addr *myaddr, msgr->inst.addr.type = 0; get_random_bytes(&msgr->inst.addr.nonce, sizeof(msgr->inst.addr.nonce)); encode_my_addr(msgr); + msgr->nocrc = nocrc; - dout("messenger_create %p\n", msgr); - return msgr; -} -EXPORT_SYMBOL(ceph_messenger_create); + atomic_set(&msgr->stopping, 0); -void ceph_messenger_destroy(struct ceph_messenger *msgr) -{ - dout("destroy %p\n", msgr); - kfree(msgr); - dout("destroyed messenger %p\n", msgr); + dout("%s %p\n", __func__, msgr); } -EXPORT_SYMBOL(ceph_messenger_destroy); +EXPORT_SYMBOL(ceph_messenger_init); static void clear_standby(struct ceph_connection *con) { /* come back from STANDBY? */ - if (test_and_clear_bit(STANDBY, &con->state)) { - mutex_lock(&con->mutex); + if (con->state == CON_STATE_STANDBY) { dout("clear_standby %p and ++connect_seq\n", con); + con->state = CON_STATE_PREOPEN; con->connect_seq++; - WARN_ON(test_bit(WRITE_PENDING, &con->state)); - WARN_ON(test_bit(KEEPALIVE_PENDING, &con->state)); - mutex_unlock(&con->mutex); + WARN_ON(test_bit(CON_FLAG_WRITE_PENDING, &con->flags)); + WARN_ON(test_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags)); } } @@ -2316,21 +2476,24 @@ static void clear_standby(struct ceph_connection *con) */ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) { - if (test_bit(CLOSED, &con->state)) { - dout("con_send %p closed, dropping %p\n", con, msg); - ceph_msg_put(msg); - return; - } - /* set src+dst */ msg->hdr.src = con->msgr->inst.name; - BUG_ON(msg->front.iov_len != le32_to_cpu(msg->hdr.front_len)); - msg->needs_out_seq = true; - /* queue */ mutex_lock(&con->mutex); + + if (con->state == CON_STATE_CLOSED) { + dout("con_send %p closed, dropping %p\n", con, msg); + ceph_msg_put(msg); + mutex_unlock(&con->mutex); + return; + } + + BUG_ON(msg->con != NULL); + msg->con = con->ops->get(con); + BUG_ON(msg->con == NULL); + BUG_ON(!list_empty(&msg->list_head)); list_add_tail(&msg->list_head, &con->out_queue); dout("----- %p to %s%lld %d=%s len %d+%d+%d -----\n", msg, @@ -2339,12 +2502,13 @@ void ceph_con_send(struct ceph_connection *con, struct ceph_msg *msg) le32_to_cpu(msg->hdr.front_len), le32_to_cpu(msg->hdr.middle_len), le32_to_cpu(msg->hdr.data_len)); + + clear_standby(con); mutex_unlock(&con->mutex); /* if there wasn't anything waiting to send before, queue * new work */ - clear_standby(con); - if (test_and_set_bit(WRITE_PENDING, &con->state) == 0) + if (test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) queue_con(con); } EXPORT_SYMBOL(ceph_con_send); @@ -2352,24 +2516,34 @@ EXPORT_SYMBOL(ceph_con_send); /* * Revoke a message that was previously queued for send */ -void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) +void ceph_msg_revoke(struct ceph_msg *msg) { + struct ceph_connection *con = msg->con; + + if (!con) + return; /* Message not in our possession */ + mutex_lock(&con->mutex); if (!list_empty(&msg->list_head)) { - dout("con_revoke %p msg %p - was on queue\n", con, msg); + dout("%s %p msg %p - was on queue\n", __func__, con, msg); list_del_init(&msg->list_head); - ceph_msg_put(msg); + BUG_ON(msg->con == NULL); + msg->con->ops->put(msg->con); + msg->con = NULL; msg->hdr.seq = 0; + + ceph_msg_put(msg); } if (con->out_msg == msg) { - dout("con_revoke %p msg %p - was sending\n", con, msg); + dout("%s %p msg %p - was sending\n", __func__, con, msg); con->out_msg = NULL; if (con->out_kvec_is_msg) { con->out_skip = con->out_kvec_bytes; con->out_kvec_is_msg = false; } - ceph_msg_put(msg); msg->hdr.seq = 0; + + ceph_msg_put(msg); } mutex_unlock(&con->mutex); } @@ -2377,17 +2551,27 @@ void ceph_con_revoke(struct ceph_connection *con, struct ceph_msg *msg) /* * Revoke a message that we may be reading data into */ -void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) +void ceph_msg_revoke_incoming(struct ceph_msg *msg) { + struct ceph_connection *con; + + BUG_ON(msg == NULL); + if (!msg->con) { + dout("%s msg %p null con\n", __func__, msg); + + return; /* Message not in our possession */ + } + + con = msg->con; mutex_lock(&con->mutex); - if (con->in_msg && con->in_msg == msg) { + if (con->in_msg == msg) { unsigned int front_len = le32_to_cpu(con->in_hdr.front_len); unsigned int middle_len = le32_to_cpu(con->in_hdr.middle_len); unsigned int data_len = le32_to_cpu(con->in_hdr.data_len); /* skip rest of message */ - dout("con_revoke_pages %p msg %p revoked\n", con, msg); - con->in_base_pos = con->in_base_pos - + dout("%s %p msg %p revoked\n", __func__, con, msg); + con->in_base_pos = con->in_base_pos - sizeof(struct ceph_msg_header) - front_len - middle_len - @@ -2398,8 +2582,8 @@ void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) con->in_tag = CEPH_MSGR_TAG_READY; con->in_seq++; } else { - dout("con_revoke_pages %p msg %p pages %p no-op\n", - con, con->in_msg, msg); + dout("%s %p in_msg %p msg %p no-op\n", + __func__, con, con->in_msg, msg); } mutex_unlock(&con->mutex); } @@ -2410,9 +2594,11 @@ void ceph_con_revoke_message(struct ceph_connection *con, struct ceph_msg *msg) void ceph_con_keepalive(struct ceph_connection *con) { dout("con_keepalive %p\n", con); + mutex_lock(&con->mutex); clear_standby(con); - if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 && - test_and_set_bit(WRITE_PENDING, &con->state) == 0) + mutex_unlock(&con->mutex); + if (test_and_set_bit(CON_FLAG_KEEPALIVE_PENDING, &con->flags) == 0 && + test_and_set_bit(CON_FLAG_WRITE_PENDING, &con->flags) == 0) queue_con(con); } EXPORT_SYMBOL(ceph_con_keepalive); @@ -2431,6 +2617,8 @@ struct ceph_msg *ceph_msg_new(int type, int front_len, gfp_t flags, if (m == NULL) goto out; kref_init(&m->kref); + + m->con = NULL; INIT_LIST_HEAD(&m->list_head); m->hdr.tid = 0; @@ -2526,46 +2714,77 @@ static int ceph_alloc_middle(struct ceph_connection *con, struct ceph_msg *msg) } /* - * Generic message allocator, for incoming messages. + * Allocate a message for receiving an incoming message on a + * connection, and save the result in con->in_msg. Uses the + * connection's private alloc_msg op if available. + * + * Returns 0 on success, or a negative error code. + * + * On success, if we set *skip = 1: + * - the next message should be skipped and ignored. + * - con->in_msg == NULL + * or if we set *skip = 0: + * - con->in_msg is non-null. + * On error (ENOMEM, EAGAIN, ...), + * - con->in_msg == NULL */ -static struct ceph_msg *ceph_alloc_msg(struct ceph_connection *con, - struct ceph_msg_header *hdr, - int *skip) +static int ceph_con_in_msg_alloc(struct ceph_connection *con, int *skip) { + struct ceph_msg_header *hdr = &con->in_hdr; int type = le16_to_cpu(hdr->type); int front_len = le32_to_cpu(hdr->front_len); int middle_len = le32_to_cpu(hdr->middle_len); - struct ceph_msg *msg = NULL; - int ret; + int ret = 0; + + BUG_ON(con->in_msg != NULL); if (con->ops->alloc_msg) { + struct ceph_msg *msg; + mutex_unlock(&con->mutex); msg = con->ops->alloc_msg(con, hdr, skip); mutex_lock(&con->mutex); - if (!msg || *skip) - return NULL; + if (con->state != CON_STATE_OPEN) { + ceph_msg_put(msg); + return -EAGAIN; + } + con->in_msg = msg; + if (con->in_msg) { + con->in_msg->con = con->ops->get(con); + BUG_ON(con->in_msg->con == NULL); + } + if (*skip) { + con->in_msg = NULL; + return 0; + } + if (!con->in_msg) { + con->error_msg = + "error allocating memory for incoming message"; + return -ENOMEM; + } } - if (!msg) { - *skip = 0; - msg = ceph_msg_new(type, front_len, GFP_NOFS, false); - if (!msg) { + if (!con->in_msg) { + con->in_msg = ceph_msg_new(type, front_len, GFP_NOFS, false); + if (!con->in_msg) { pr_err("unable to allocate msg type %d len %d\n", type, front_len); - return NULL; + return -ENOMEM; } - msg->page_alignment = le16_to_cpu(hdr->data_off); + con->in_msg->con = con->ops->get(con); + BUG_ON(con->in_msg->con == NULL); + con->in_msg->page_alignment = le16_to_cpu(hdr->data_off); } - memcpy(&msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); + memcpy(&con->in_msg->hdr, &con->in_hdr, sizeof(con->in_hdr)); - if (middle_len && !msg->middle) { - ret = ceph_alloc_middle(con, msg); + if (middle_len && !con->in_msg->middle) { + ret = ceph_alloc_middle(con, con->in_msg); if (ret < 0) { - ceph_msg_put(msg); - return NULL; + ceph_msg_put(con->in_msg); + con->in_msg = NULL; } } - return msg; + return ret; } diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c index d0649a9..105d533 100644 --- a/net/ceph/mon_client.c +++ b/net/ceph/mon_client.c @@ -106,9 +106,9 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) monc->pending_auth = 1; monc->m_auth->front.iov_len = len; monc->m_auth->hdr.front_len = cpu_to_le32(len); - ceph_con_revoke(monc->con, monc->m_auth); + ceph_msg_revoke(monc->m_auth); ceph_msg_get(monc->m_auth); /* keep our ref */ - ceph_con_send(monc->con, monc->m_auth); + ceph_con_send(&monc->con, monc->m_auth); } /* @@ -117,8 +117,11 @@ static void __send_prepared_auth_request(struct ceph_mon_client *monc, int len) static void __close_session(struct ceph_mon_client *monc) { dout("__close_session closing mon%d\n", monc->cur_mon); - ceph_con_revoke(monc->con, monc->m_auth); - ceph_con_close(monc->con); + ceph_msg_revoke(monc->m_auth); + ceph_msg_revoke_incoming(monc->m_auth_reply); + ceph_msg_revoke(monc->m_subscribe); + ceph_msg_revoke_incoming(monc->m_subscribe_ack); + ceph_con_close(&monc->con); monc->cur_mon = -1; monc->pending_auth = 0; ceph_auth_reset(monc->auth); @@ -142,9 +145,8 @@ static int __open_session(struct ceph_mon_client *monc) monc->want_next_osdmap = !!monc->want_next_osdmap; dout("open_session mon%d opening\n", monc->cur_mon); - monc->con->peer_name.type = CEPH_ENTITY_TYPE_MON; - monc->con->peer_name.num = cpu_to_le64(monc->cur_mon); - ceph_con_open(monc->con, + ceph_con_open(&monc->con, + CEPH_ENTITY_TYPE_MON, monc->cur_mon, &monc->monmap->mon_inst[monc->cur_mon].addr); /* initiatiate authentication handshake */ @@ -226,8 +228,8 @@ static void __send_subscribe(struct ceph_mon_client *monc) msg->front.iov_len = p - msg->front.iov_base; msg->hdr.front_len = cpu_to_le32(msg->front.iov_len); - ceph_con_revoke(monc->con, msg); - ceph_con_send(monc->con, ceph_msg_get(msg)); + ceph_msg_revoke(msg); + ceph_con_send(&monc->con, ceph_msg_get(msg)); monc->sub_sent = jiffies | 1; /* never 0 */ } @@ -247,7 +249,7 @@ static void handle_subscribe_ack(struct ceph_mon_client *monc, if (monc->hunting) { pr_info("mon%d %s session established\n", monc->cur_mon, - ceph_pr_addr(&monc->con->peer_addr.in_addr)); + ceph_pr_addr(&monc->con.peer_addr.in_addr)); monc->hunting = false; } dout("handle_subscribe_ack after %d seconds\n", seconds); @@ -439,6 +441,7 @@ static struct ceph_msg *get_generic_reply(struct ceph_connection *con, m = NULL; } else { dout("get_generic_reply %lld got %p\n", tid, req->reply); + *skip = 0; m = ceph_msg_get(req->reply); /* * we don't need to track the connection reading into @@ -461,7 +464,7 @@ static int do_generic_request(struct ceph_mon_client *monc, req->request->hdr.tid = cpu_to_le64(req->tid); __insert_generic_request(monc, req); monc->num_generic_requests++; - ceph_con_send(monc->con, ceph_msg_get(req->request)); + ceph_con_send(&monc->con, ceph_msg_get(req->request)); mutex_unlock(&monc->mutex); err = wait_for_completion_interruptible(&req->completion); @@ -684,8 +687,9 @@ static void __resend_generic_request(struct ceph_mon_client *monc) for (p = rb_first(&monc->generic_request_tree); p; p = rb_next(p)) { req = rb_entry(p, struct ceph_mon_generic_request, node); - ceph_con_revoke(monc->con, req->request); - ceph_con_send(monc->con, ceph_msg_get(req->request)); + ceph_msg_revoke(req->request); + ceph_msg_revoke_incoming(req->reply); + ceph_con_send(&monc->con, ceph_msg_get(req->request)); } } @@ -705,7 +709,7 @@ static void delayed_work(struct work_struct *work) __close_session(monc); __open_session(monc); /* continue hunting */ } else { - ceph_con_keepalive(monc->con); + ceph_con_keepalive(&monc->con); __validate_auth(monc); @@ -760,19 +764,12 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) goto out; /* connection */ - monc->con = kmalloc(sizeof(*monc->con), GFP_KERNEL); - if (!monc->con) - goto out_monmap; - ceph_con_init(monc->client->msgr, monc->con); - monc->con->private = monc; - monc->con->ops = &mon_con_ops; - /* authentication */ monc->auth = ceph_auth_init(cl->options->name, cl->options->key); if (IS_ERR(monc->auth)) { err = PTR_ERR(monc->auth); - goto out_con; + goto out_monmap; } monc->auth->want_keys = CEPH_ENTITY_TYPE_AUTH | CEPH_ENTITY_TYPE_MON | @@ -801,6 +798,9 @@ int ceph_monc_init(struct ceph_mon_client *monc, struct ceph_client *cl) if (!monc->m_auth) goto out_auth_reply; + ceph_con_init(&monc->con, monc, &mon_con_ops, + &monc->client->msgr); + monc->cur_mon = -1; monc->hunting = true; monc->sub_renew_after = jiffies; @@ -824,8 +824,6 @@ out_subscribe_ack: ceph_msg_put(monc->m_subscribe_ack); out_auth: ceph_auth_destroy(monc->auth); -out_con: - monc->con->ops->put(monc->con); out_monmap: kfree(monc->monmap); out: @@ -841,10 +839,6 @@ void ceph_monc_stop(struct ceph_mon_client *monc) mutex_lock(&monc->mutex); __close_session(monc); - monc->con->private = NULL; - monc->con->ops->put(monc->con); - monc->con = NULL; - mutex_unlock(&monc->mutex); /* @@ -888,8 +882,8 @@ static void handle_auth_reply(struct ceph_mon_client *monc, } else if (!was_auth && monc->auth->ops->is_authenticated(monc->auth)) { dout("authenticated, starting session\n"); - monc->client->msgr->inst.name.type = CEPH_ENTITY_TYPE_CLIENT; - monc->client->msgr->inst.name.num = + monc->client->msgr.inst.name.type = CEPH_ENTITY_TYPE_CLIENT; + monc->client->msgr.inst.name.num = cpu_to_le64(monc->auth->global_id); __send_subscribe(monc); @@ -1000,6 +994,8 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con, case CEPH_MSG_MDS_MAP: case CEPH_MSG_OSD_MAP: m = ceph_msg_new(type, front_len, GFP_NOFS, false); + if (!m) + return NULL; /* ENOMEM--return skip == 0 */ break; } @@ -1029,7 +1025,7 @@ static void mon_fault(struct ceph_connection *con) if (!monc->hunting) pr_info("mon%d %s session lost, " "hunting for new mon\n", monc->cur_mon, - ceph_pr_addr(&monc->con->peer_addr.in_addr)); + ceph_pr_addr(&monc->con.peer_addr.in_addr)); __close_session(monc); if (!monc->hunting) { @@ -1044,9 +1040,23 @@ out: mutex_unlock(&monc->mutex); } +/* + * We can ignore refcounting on the connection struct, as all references + * will come from the messenger workqueue, which is drained prior to + * mon_client destruction. + */ +static struct ceph_connection *con_get(struct ceph_connection *con) +{ + return con; +} + +static void con_put(struct ceph_connection *con) +{ +} + static const struct ceph_connection_operations mon_con_ops = { - .get = ceph_con_get, - .put = ceph_con_put, + .get = con_get, + .put = con_put, .dispatch = dispatch, .fault = mon_fault, .alloc_msg = mon_alloc_msg, diff --git a/net/ceph/msgpool.c b/net/ceph/msgpool.c index 11d5f41..ddec1c1 100644 --- a/net/ceph/msgpool.c +++ b/net/ceph/msgpool.c @@ -12,7 +12,7 @@ static void *msgpool_alloc(gfp_t gfp_mask, void *arg) struct ceph_msgpool *pool = arg; struct ceph_msg *msg; - msg = ceph_msg_new(0, pool->front_len, gfp_mask, true); + msg = ceph_msg_new(pool->type, pool->front_len, gfp_mask, true); if (!msg) { dout("msgpool_alloc %s failed\n", pool->name); } else { @@ -32,10 +32,11 @@ static void msgpool_free(void *element, void *arg) ceph_msg_put(msg); } -int ceph_msgpool_init(struct ceph_msgpool *pool, +int ceph_msgpool_init(struct ceph_msgpool *pool, int type, int front_len, int size, bool blocking, const char *name) { dout("msgpool %s init\n", name); + pool->type = type; pool->front_len = front_len; pool->pool = mempool_create(size, msgpool_alloc, msgpool_free, pool); if (!pool->pool) @@ -61,7 +62,7 @@ struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *pool, WARN_ON(1); /* try to alloc a fresh message */ - return ceph_msg_new(0, front_len, GFP_NOFS, false); + return ceph_msg_new(pool->type, front_len, GFP_NOFS, false); } msg = mempool_alloc(pool->pool, GFP_NOFS); diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index ca59e66..42119c0 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -140,10 +140,9 @@ void ceph_osdc_release_request(struct kref *kref) if (req->r_request) ceph_msg_put(req->r_request); if (req->r_con_filling_msg) { - dout("release_request revoking pages %p from con %p\n", + dout("%s revoking pages %p from con %p\n", __func__, req->r_pages, req->r_con_filling_msg); - ceph_con_revoke_message(req->r_con_filling_msg, - req->r_reply); + ceph_msg_revoke_incoming(req->r_reply); req->r_con_filling_msg->ops->put(req->r_con_filling_msg); } if (req->r_reply) @@ -214,10 +213,13 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, kref_init(&req->r_kref); init_completion(&req->r_completion); init_completion(&req->r_safe_completion); + rb_init_node(&req->r_node); INIT_LIST_HEAD(&req->r_unsafe_item); INIT_LIST_HEAD(&req->r_linger_item); INIT_LIST_HEAD(&req->r_linger_osd); INIT_LIST_HEAD(&req->r_req_lru_item); + INIT_LIST_HEAD(&req->r_osd_item); + req->r_flags = flags; WARN_ON((flags & (CEPH_OSD_FLAG_READ|CEPH_OSD_FLAG_WRITE)) == 0); @@ -243,6 +245,7 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, } ceph_pagelist_init(req->r_trail); } + /* create request message; allow space for oid */ msg_size += MAX_OBJ_NAME_SIZE; if (snapc) @@ -256,7 +259,6 @@ struct ceph_osd_request *ceph_osdc_alloc_request(struct ceph_osd_client *osdc, return NULL; } - msg->hdr.type = cpu_to_le16(CEPH_MSG_OSD_OP); memset(msg->front.iov_base, 0, msg->front.iov_len); req->r_request = msg; @@ -624,7 +626,7 @@ static void osd_reset(struct ceph_connection *con) /* * Track open sessions with osds. */ -static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) +static struct ceph_osd *create_osd(struct ceph_osd_client *osdc, int onum) { struct ceph_osd *osd; @@ -634,15 +636,13 @@ static struct ceph_osd *create_osd(struct ceph_osd_client *osdc) atomic_set(&osd->o_ref, 1); osd->o_osdc = osdc; + osd->o_osd = onum; INIT_LIST_HEAD(&osd->o_requests); INIT_LIST_HEAD(&osd->o_linger_requests); INIT_LIST_HEAD(&osd->o_osd_lru); osd->o_incarnation = 1; - ceph_con_init(osdc->client->msgr, &osd->o_con); - osd->o_con.private = osd; - osd->o_con.ops = &osd_con_ops; - osd->o_con.peer_name.type = CEPH_ENTITY_TYPE_OSD; + ceph_con_init(&osd->o_con, osd, &osd_con_ops, &osdc->client->msgr); INIT_LIST_HEAD(&osd->o_keepalive_item); return osd; @@ -688,7 +688,7 @@ static void __remove_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) static void remove_all_osds(struct ceph_osd_client *osdc) { - dout("__remove_old_osds %p\n", osdc); + dout("%s %p\n", __func__, osdc); mutex_lock(&osdc->request_mutex); while (!RB_EMPTY_ROOT(&osdc->osds)) { struct ceph_osd *osd = rb_entry(rb_first(&osdc->osds), @@ -752,7 +752,8 @@ static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd) ret = -EAGAIN; } else { ceph_con_close(&osd->o_con); - ceph_con_open(&osd->o_con, &osdc->osdmap->osd_addr[osd->o_osd]); + ceph_con_open(&osd->o_con, CEPH_ENTITY_TYPE_OSD, osd->o_osd, + &osdc->osdmap->osd_addr[osd->o_osd]); osd->o_incarnation++; } return ret; @@ -853,7 +854,7 @@ static void __unregister_request(struct ceph_osd_client *osdc, if (req->r_osd) { /* make sure the original request isn't in flight. */ - ceph_con_revoke(&req->r_osd->o_con, req->r_request); + ceph_msg_revoke(req->r_request); list_del_init(&req->r_osd_item); if (list_empty(&req->r_osd->o_requests) && @@ -880,7 +881,7 @@ static void __unregister_request(struct ceph_osd_client *osdc, static void __cancel_request(struct ceph_osd_request *req) { if (req->r_sent && req->r_osd) { - ceph_con_revoke(&req->r_osd->o_con, req->r_request); + ceph_msg_revoke(req->r_request); req->r_sent = 0; } } @@ -890,7 +891,9 @@ static void __register_linger_request(struct ceph_osd_client *osdc, { dout("__register_linger_request %p\n", req); list_add_tail(&req->r_linger_item, &osdc->req_linger); - list_add_tail(&req->r_linger_osd, &req->r_osd->o_linger_requests); + if (req->r_osd) + list_add_tail(&req->r_linger_osd, + &req->r_osd->o_linger_requests); } static void __unregister_linger_request(struct ceph_osd_client *osdc, @@ -998,18 +1001,18 @@ static int __map_request(struct ceph_osd_client *osdc, req->r_osd = __lookup_osd(osdc, o); if (!req->r_osd && o >= 0) { err = -ENOMEM; - req->r_osd = create_osd(osdc); + req->r_osd = create_osd(osdc, o); if (!req->r_osd) { list_move(&req->r_req_lru_item, &osdc->req_notarget); goto out; } dout("map_request osd %p is osd%d\n", req->r_osd, o); - req->r_osd->o_osd = o; - req->r_osd->o_con.peer_name.num = cpu_to_le64(o); __insert_osd(osdc, req->r_osd); - ceph_con_open(&req->r_osd->o_con, &osdc->osdmap->osd_addr[o]); + ceph_con_open(&req->r_osd->o_con, + CEPH_ENTITY_TYPE_OSD, o, + &osdc->osdmap->osd_addr[o]); } if (req->r_osd) { @@ -1304,8 +1307,9 @@ static void kick_requests(struct ceph_osd_client *osdc, int force_resend) dout("kick_requests %s\n", force_resend ? " (force resend)" : ""); mutex_lock(&osdc->request_mutex); - for (p = rb_first(&osdc->requests); p; p = rb_next(p)) { + for (p = rb_first(&osdc->requests); p; ) { req = rb_entry(p, struct ceph_osd_request, r_node); + p = rb_next(p); err = __map_request(osdc, req, force_resend); if (err < 0) continue; /* error */ @@ -1313,10 +1317,23 @@ static void kick_requests(struct ceph_osd_client *osdc, int force_resend) dout("%p tid %llu maps to no osd\n", req, req->r_tid); needmap++; /* request a newer map */ } else if (err > 0) { - dout("%p tid %llu requeued on osd%d\n", req, req->r_tid, - req->r_osd ? req->r_osd->o_osd : -1); - if (!req->r_linger) + if (!req->r_linger) { + dout("%p tid %llu requeued on osd%d\n", req, + req->r_tid, + req->r_osd ? req->r_osd->o_osd : -1); req->r_flags |= CEPH_OSD_FLAG_RETRY; + } + } + if (req->r_linger && list_empty(&req->r_linger_item)) { + /* + * register as a linger so that we will + * re-submit below and get a new tid + */ + dout("%p tid %llu restart on osd%d\n", + req, req->r_tid, + req->r_osd ? req->r_osd->o_osd : -1); + __register_linger_request(osdc, req); + __unregister_request(osdc, req); } } @@ -1391,7 +1408,7 @@ void ceph_osdc_handle_map(struct ceph_osd_client *osdc, struct ceph_msg *msg) epoch, maplen); newmap = osdmap_apply_incremental(&p, next, osdc->osdmap, - osdc->client->msgr); + &osdc->client->msgr); if (IS_ERR(newmap)) { err = PTR_ERR(newmap); goto bad; @@ -1839,11 +1856,12 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client) if (!osdc->req_mempool) goto out; - err = ceph_msgpool_init(&osdc->msgpool_op, OSD_OP_FRONT_LEN, 10, true, + err = ceph_msgpool_init(&osdc->msgpool_op, CEPH_MSG_OSD_OP, + OSD_OP_FRONT_LEN, 10, true, "osd_op"); if (err < 0) goto out_mempool; - err = ceph_msgpool_init(&osdc->msgpool_op_reply, + err = ceph_msgpool_init(&osdc->msgpool_op_reply, CEPH_MSG_OSD_OPREPLY, OSD_OPREPLY_FRONT_LEN, 10, true, "osd_op_reply"); if (err < 0) @@ -2019,15 +2037,15 @@ static struct ceph_msg *get_reply(struct ceph_connection *con, if (!req) { *skip = 1; m = NULL; - pr_info("get_reply unknown tid %llu from osd%d\n", tid, - osd->o_osd); + dout("get_reply unknown tid %llu from osd%d\n", tid, + osd->o_osd); goto out; } if (req->r_con_filling_msg) { - dout("get_reply revoking msg %p from old con %p\n", + dout("%s revoking msg %p from old con %p\n", __func__, req->r_reply, req->r_con_filling_msg); - ceph_con_revoke_message(req->r_con_filling_msg, req->r_reply); + ceph_msg_revoke_incoming(req->r_reply); req->r_con_filling_msg->ops->put(req->r_con_filling_msg); req->r_con_filling_msg = NULL; } @@ -2080,6 +2098,7 @@ static struct ceph_msg *alloc_msg(struct ceph_connection *con, int type = le16_to_cpu(hdr->type); int front = le32_to_cpu(hdr->front_len); + *skip = 0; switch (type) { case CEPH_MSG_OSD_MAP: case CEPH_MSG_WATCH_NOTIFY: diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c index 81e3b84..3124b71 100644 --- a/net/ceph/osdmap.c +++ b/net/ceph/osdmap.c @@ -135,6 +135,21 @@ bad: return -EINVAL; } +static int skip_name_map(void **p, void *end) +{ + int len; + ceph_decode_32_safe(p, end, len ,bad); + while (len--) { + int strlen; + *p += sizeof(u32); + ceph_decode_32_safe(p, end, strlen, bad); + *p += strlen; +} + return 0; +bad: + return -EINVAL; +} + static struct crush_map *crush_decode(void *pbyval, void *end) { struct crush_map *c; @@ -143,6 +158,7 @@ static struct crush_map *crush_decode(void *pbyval, void *end) void **p = &pbyval; void *start = pbyval; u32 magic; + u32 num_name_maps; dout("crush_decode %p to %p len %d\n", *p, end, (int)(end - *p)); @@ -150,6 +166,11 @@ static struct crush_map *crush_decode(void *pbyval, void *end) if (c == NULL) return ERR_PTR(-ENOMEM); + /* set tunables to default values */ + c->choose_local_tries = 2; + c->choose_local_fallback_tries = 5; + c->choose_total_tries = 19; + ceph_decode_need(p, end, 4*sizeof(u32), bad); magic = ceph_decode_32(p); if (magic != CRUSH_MAGIC) { @@ -297,7 +318,25 @@ static struct crush_map *crush_decode(void *pbyval, void *end) } /* ignore trailing name maps. */ + for (num_name_maps = 0; num_name_maps < 3; num_name_maps++) { + err = skip_name_map(p, end); + if (err < 0) + goto done; + } + + /* tunables */ + ceph_decode_need(p, end, 3*sizeof(u32), done); + c->choose_local_tries = ceph_decode_32(p); + c->choose_local_fallback_tries = ceph_decode_32(p); + c->choose_total_tries = ceph_decode_32(p); + dout("crush decode tunable choose_local_tries = %d", + c->choose_local_tries); + dout("crush decode tunable choose_local_fallback_tries = %d", + c->choose_local_fallback_tries); + dout("crush decode tunable choose_total_tries = %d", + c->choose_total_tries); +done: dout("crush_decode success\n"); return c; @@ -488,15 +527,16 @@ static int __decode_pool_names(void **p, void *end, struct ceph_osdmap *map) ceph_decode_32_safe(p, end, pool, bad); ceph_decode_32_safe(p, end, len, bad); dout(" pool %d len %d\n", pool, len); + ceph_decode_need(p, end, len, bad); pi = __lookup_pg_pool(&map->pg_pools, pool); if (pi) { + char *name = kstrndup(*p, len, GFP_NOFS); + + if (!name) + return -ENOMEM; kfree(pi->name); - pi->name = kmalloc(len + 1, GFP_NOFS); - if (pi->name) { - memcpy(pi->name, *p, len); - pi->name[len] = '\0'; - dout(" name is %s\n", pi->name); - } + pi->name = name; + dout(" name is %s\n", pi->name); } *p += len; } @@ -666,6 +706,9 @@ struct ceph_osdmap *osdmap_decode(void **p, void *end) ceph_decode_need(p, end, sizeof(u32) + sizeof(u64), bad); ceph_decode_copy(p, &pgid, sizeof(pgid)); n = ceph_decode_32(p); + err = -EINVAL; + if (n > (UINT_MAX - sizeof(*pg)) / sizeof(u32)) + goto bad; ceph_decode_need(p, end, n * sizeof(u32), bad); err = -ENOMEM; pg = kmalloc(sizeof(*pg) + n*sizeof(u32), GFP_NOFS); @@ -889,6 +932,10 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end, (void) __remove_pg_mapping(&map->pg_temp, pgid); /* insert */ + if (pglen > (UINT_MAX - sizeof(*pg)) / sizeof(u32)) { + err = -EINVAL; + goto bad; + } pg = kmalloc(sizeof(*pg) + sizeof(u32)*pglen, GFP_NOFS); if (!pg) { err = -ENOMEM; |