diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-22 17:52:01 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-22 17:52:01 (GMT) |
commit | 79f14b7c56d3b3ba58f8b43d1f70b9b71477a800 (patch) | |
tree | 3bb53b7806c1baba6cc24b91724a9264cceccd39 /fs/ncpfs | |
parent | c37927d4359e81b85de644f8fb08878717cf5f3f (diff) | |
parent | 6d7bccc2215c37205ede6c9cf84db64e7c4f9443 (diff) | |
download | linux-79f14b7c56d3b3ba58f8b43d1f70b9b71477a800.tar.xz |
Merge branch 'vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl
* 'vfs' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl: (30 commits)
BKL: remove BKL from freevxfs
BKL: remove BKL from qnx4
autofs4: Only declare function when CONFIG_COMPAT is defined
autofs: Only declare function when CONFIG_COMPAT is defined
ncpfs: Lock socket in ncpfs while setting its callbacks
fs/locks.c: prepare for BKL removal
BKL: Remove BKL from ncpfs
BKL: Remove BKL from OCFS2
BKL: Remove BKL from squashfs
BKL: Remove BKL from jffs2
BKL: Remove BKL from ecryptfs
BKL: Remove BKL from afs
BKL: Remove BKL from USB gadgetfs
BKL: Remove BKL from autofs4
BKL: Remove BKL from isofs
BKL: Remove BKL from fat
BKL: Remove BKL from ext2 filesystem
BKL: Remove BKL from do_new_mount()
BKL: Remove BKL from cgroup
BKL: Remove BKL from NTFS
...
Diffstat (limited to 'fs/ncpfs')
-rw-r--r-- | fs/ncpfs/dir.c | 221 | ||||
-rw-r--r-- | fs/ncpfs/file.c | 25 | ||||
-rw-r--r-- | fs/ncpfs/inode.c | 55 | ||||
-rw-r--r-- | fs/ncpfs/ioctl.c | 470 | ||||
-rw-r--r-- | fs/ncpfs/ncplib_kernel.c | 101 | ||||
-rw-r--r-- | fs/ncpfs/ncplib_kernel.h | 15 | ||||
-rw-r--r-- | fs/ncpfs/ncpsign_kernel.c | 10 | ||||
-rw-r--r-- | fs/ncpfs/sock.c | 1 |
8 files changed, 493 insertions, 405 deletions
diff --git a/fs/ncpfs/dir.c b/fs/ncpfs/dir.c index 9578cbe..aac8832e 100644 --- a/fs/ncpfs/dir.c +++ b/fs/ncpfs/dir.c @@ -95,6 +95,34 @@ const struct dentry_operations ncp_root_dentry_operations = }; +#define ncp_namespace(i) (NCP_SERVER(i)->name_space[NCP_FINFO(i)->volNumber]) + +static inline int ncp_preserve_entry_case(struct inode *i, __u32 nscreator) +{ +#ifdef CONFIG_NCPFS_SMALLDOS + int ns = ncp_namespace(i); + + if ((ns == NW_NS_DOS) +#ifdef CONFIG_NCPFS_OS2_NS + || ((ns == NW_NS_OS2) && (nscreator == NW_NS_DOS)) +#endif /* CONFIG_NCPFS_OS2_NS */ + ) + return 0; +#endif /* CONFIG_NCPFS_SMALLDOS */ + return 1; +} + +#define ncp_preserve_case(i) (ncp_namespace(i) != NW_NS_DOS) + +static inline int ncp_case_sensitive(struct dentry *dentry) +{ +#ifdef CONFIG_NCPFS_NFS_NS + return ncp_namespace(dentry->d_inode) == NW_NS_NFS; +#else + return 0; +#endif /* CONFIG_NCPFS_NFS_NS */ +} + /* * Note: leave the hash unchanged if the directory * is case-sensitive. @@ -102,13 +130,12 @@ const struct dentry_operations ncp_root_dentry_operations = static int ncp_hash_dentry(struct dentry *dentry, struct qstr *this) { - struct nls_table *t; - unsigned long hash; - int i; - - t = NCP_IO_TABLE(dentry); + if (!ncp_case_sensitive(dentry)) { + struct nls_table *t; + unsigned long hash; + int i; - if (!ncp_case_sensitive(dentry->d_inode)) { + t = NCP_IO_TABLE(dentry); hash = init_name_hash(); for (i=0; i<this->len ; i++) hash = partial_name_hash(ncp_tolower(t, this->name[i]), @@ -124,7 +151,7 @@ ncp_compare_dentry(struct dentry *dentry, struct qstr *a, struct qstr *b) if (a->len != b->len) return 1; - if (ncp_case_sensitive(dentry->d_inode)) + if (ncp_case_sensitive(dentry)) return strncmp(a->name, b->name, a->len); return ncp_strnicmp(NCP_IO_TABLE(dentry), a->name, b->name, a->len); @@ -266,7 +293,7 @@ leave_me:; static int -__ncp_lookup_validate(struct dentry *dentry) +ncp_lookup_validate(struct dentry *dentry, struct nameidata *nd) { struct ncp_server *server; struct dentry *parent; @@ -283,9 +310,6 @@ __ncp_lookup_validate(struct dentry *dentry) server = NCP_SERVER(dir); - if (!ncp_conn_valid(server)) - goto finished; - /* * Inspired by smbfs: * The default validation is based on dentry age: @@ -304,8 +328,11 @@ __ncp_lookup_validate(struct dentry *dentry) if (ncp_is_server_root(dir)) { res = ncp_io2vol(server, __name, &len, dentry->d_name.name, dentry->d_name.len, 1); - if (!res) + if (!res) { res = ncp_lookup_volume(server, __name, &(finfo.i)); + if (!res) + ncp_update_known_namespace(server, finfo.i.volNumber, NULL); + } } else { res = ncp_io2vol(server, __name, &len, dentry->d_name.name, dentry->d_name.len, !ncp_preserve_case(dir)); @@ -320,13 +347,17 @@ __ncp_lookup_validate(struct dentry *dentry) * what we remember, it's not valid any more. */ if (!res) { - if (finfo.i.dirEntNum == NCP_FINFO(dentry->d_inode)->dirEntNum) { + struct inode *inode = dentry->d_inode; + + mutex_lock(&inode->i_mutex); + if (finfo.i.dirEntNum == NCP_FINFO(inode)->dirEntNum) { ncp_new_dentry(dentry); val=1; } else DDPRINTK("ncp_lookup_validate: found, but dirEntNum changed\n"); - ncp_update_inode2(dentry->d_inode, &finfo); + ncp_update_inode2(inode, &finfo); + mutex_unlock(&inode->i_mutex); } finished: @@ -335,16 +366,6 @@ finished: return val; } -static int -ncp_lookup_validate(struct dentry * dentry, struct nameidata *nd) -{ - int res; - lock_kernel(); - res = __ncp_lookup_validate(dentry); - unlock_kernel(); - return res; -} - static struct dentry * ncp_dget_fpos(struct dentry *dentry, struct dentry *parent, unsigned long fpos) { @@ -411,8 +432,6 @@ static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) int result, mtime_valid = 0; time_t mtime = 0; - lock_kernel(); - ctl.page = NULL; ctl.cache = NULL; @@ -421,6 +440,7 @@ static int ncp_readdir(struct file *filp, void *dirent, filldir_t filldir) (int) filp->f_pos); result = -EIO; + /* Do not generate '.' and '..' when server is dead. */ if (!ncp_conn_valid(server)) goto out; @@ -532,6 +552,12 @@ read_really: ctl.head.end = ctl.fpos - 1; ctl.head.eof = ctl.valid; finished: + if (ctl.page) { + kunmap(ctl.page); + SetPageUptodate(ctl.page); + unlock_page(ctl.page); + page_cache_release(ctl.page); + } if (page) { cache->head = ctl.head; kunmap(page); @@ -539,23 +565,17 @@ finished: unlock_page(page); page_cache_release(page); } - if (ctl.page) { - kunmap(ctl.page); - SetPageUptodate(ctl.page); - unlock_page(ctl.page); - page_cache_release(ctl.page); - } out: - unlock_kernel(); return result; } static int ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, - struct ncp_cache_control *ctrl, struct ncp_entry_info *entry) + struct ncp_cache_control *ctrl, struct ncp_entry_info *entry, + int inval_childs) { struct dentry *newdent, *dentry = filp->f_path.dentry; - struct inode *newino, *inode = dentry->d_inode; + struct inode *dir = dentry->d_inode; struct ncp_cache_control ctl = *ctrl; struct qstr qname; int valid = 0; @@ -564,9 +584,9 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, __u8 __name[NCP_MAXPATHLEN + 1]; qname.len = sizeof(__name); - if (ncp_vol2io(NCP_SERVER(inode), __name, &qname.len, + if (ncp_vol2io(NCP_SERVER(dir), __name, &qname.len, entry->i.entryName, entry->i.nameLen, - !ncp_preserve_entry_case(inode, entry->i.NSCreator))) + !ncp_preserve_entry_case(dir, entry->i.NSCreator))) return 1; /* I'm not sure */ qname.name = __name; @@ -584,22 +604,64 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, goto end_advance; } else { hashed = 1; - memcpy((char *) newdent->d_name.name, qname.name, - newdent->d_name.len); + + /* If case sensitivity changed for this volume, all entries below this one + should be thrown away. This entry itself is not affected, as its case + sensitivity is controlled by its own parent. */ + if (inval_childs) + shrink_dcache_parent(newdent); + + /* + * It is not as dangerous as it looks. NetWare's OS2 namespace is + * case preserving yet case insensitive. So we update dentry's name + * as received from server. We found dentry via d_lookup with our + * hash, so we know that hash does not change, and so replacing name + * should be reasonably safe. + */ + if (qname.len == newdent->d_name.len && + memcmp(newdent->d_name.name, qname.name, newdent->d_name.len)) { + struct inode *inode = newdent->d_inode; + + /* + * Inside ncpfs all uses of d_name are either for debugging, + * or on functions which acquire inode mutex (mknod, creat, + * lookup). So grab i_mutex here, to be sure. d_path + * uses dcache_lock when generating path, so we should too. + * And finally d_compare is protected by dentry's d_lock, so + * here we go. + */ + if (inode) + mutex_lock(&inode->i_mutex); + spin_lock(&dcache_lock); + spin_lock(&newdent->d_lock); + memcpy((char *) newdent->d_name.name, qname.name, + newdent->d_name.len); + spin_unlock(&newdent->d_lock); + spin_unlock(&dcache_lock); + if (inode) + mutex_unlock(&inode->i_mutex); + } } if (!newdent->d_inode) { + struct inode *inode; + entry->opened = 0; - entry->ino = iunique(inode->i_sb, 2); - newino = ncp_iget(inode->i_sb, entry); - if (newino) { + entry->ino = iunique(dir->i_sb, 2); + inode = ncp_iget(dir->i_sb, entry); + if (inode) { newdent->d_op = &ncp_dentry_operations; - d_instantiate(newdent, newino); + d_instantiate(newdent, inode); if (!hashed) d_rehash(newdent); } - } else - ncp_update_inode2(newdent->d_inode, entry); + } else { + struct inode *inode = newdent->d_inode; + + mutex_lock(&inode->i_mutex); + ncp_update_inode2(inode, entry); + mutex_unlock(&inode->i_mutex); + } if (newdent->d_inode) { ino = newdent->d_inode->i_ino; @@ -617,7 +679,7 @@ ncp_fill_cache(struct file *filp, void *dirent, filldir_t filldir, ctl.cache = NULL; ctl.idx -= NCP_DIRCACHE_SIZE; ctl.ofs += 1; - ctl.page = grab_cache_page(&inode->i_data, ctl.ofs); + ctl.page = grab_cache_page(&dir->i_data, ctl.ofs); if (ctl.page) ctl.cache = kmap(ctl.page); } @@ -633,7 +695,7 @@ end_advance: if (!ino) ino = find_inode_number(dentry, &qname); if (!ino) - ino = iunique(inode->i_sb, 2); + ino = iunique(dir->i_sb, 2); ctl.filled = filldir(dirent, qname.name, qname.len, filp->f_pos, ino, DT_UNKNOWN); if (!ctl.filled) @@ -660,6 +722,7 @@ ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, (unsigned long) filp->f_pos); for (i = 0; i < NCP_NUMBER_OF_VOLUMES; i++) { + int inval_dentry; if (ncp_get_volume_info_with_number(server, i, &info) != 0) return; @@ -675,8 +738,9 @@ ncp_read_volume_list(struct file *filp, void *dirent, filldir_t filldir, info.volume_name); continue; } + inval_dentry = ncp_update_known_namespace(server, entry.i.volNumber, NULL); entry.volume = entry.i.volNumber; - if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) + if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, inval_dentry)) return; } } @@ -739,7 +803,7 @@ ncp_do_readdir(struct file *filp, void *dirent, filldir_t filldir, rpl += onerpl; rpls -= onerpl; entry.volume = entry.i.volNumber; - if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry)) + if (!ncp_fill_cache(filp, dirent, filldir, ctl, &entry, 0)) break; } } while (more); @@ -775,17 +839,19 @@ int ncp_conn_logged_in(struct super_block *sb) if (dent) { struct inode* ino = dent->d_inode; if (ino) { + ncp_update_known_namespace(server, volNumber, NULL); NCP_FINFO(ino)->volNumber = volNumber; NCP_FINFO(ino)->dirEntNum = dirEntNum; NCP_FINFO(ino)->DosDirNum = DosDirNum; + result = 0; } else { DPRINTK("ncpfs: sb->s_root->d_inode == NULL!\n"); } } else { DPRINTK("ncpfs: sb->s_root == NULL!\n"); } - } - result = 0; + } else + result = 0; out: return result; @@ -799,7 +865,6 @@ static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struc int error, res, len; __u8 __name[NCP_MAXPATHLEN + 1]; - lock_kernel(); error = -EIO; if (!ncp_conn_valid(server)) goto finished; @@ -813,6 +878,8 @@ static struct dentry *ncp_lookup(struct inode *dir, struct dentry *dentry, struc dentry->d_name.len, 1); if (!res) res = ncp_lookup_volume(server, __name, &(finfo.i)); + if (!res) + ncp_update_known_namespace(server, finfo.i.volNumber, NULL); } else { res = ncp_io2vol(server, __name, &len, dentry->d_name.name, dentry->d_name.len, !ncp_preserve_case(dir)); @@ -846,7 +913,6 @@ add_entry: finished: PPRINTK("ncp_lookup: result=%d\n", error); - unlock_kernel(); return ERR_PTR(error); } @@ -887,11 +953,6 @@ int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, PPRINTK("ncp_create_new: creating %s/%s, mode=%x\n", dentry->d_parent->d_name.name, dentry->d_name.name, mode); - error = -EIO; - lock_kernel(); - if (!ncp_conn_valid(server)) - goto out; - ncp_age_dentry(server, dentry); len = sizeof(__name); error = ncp_io2vol(server, __name, &len, dentry->d_name.name, @@ -917,6 +978,8 @@ int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, if (result) { if (result == 0x87) error = -ENAMETOOLONG; + else if (result < 0) + error = result; DPRINTK("ncp_create: %s/%s failed\n", dentry->d_parent->d_name.name, dentry->d_name.name); goto out; @@ -935,7 +998,6 @@ int ncp_create_new(struct inode *dir, struct dentry *dentry, int mode, error = ncp_instantiate(dir, dentry, &finfo); out: - unlock_kernel(); return error; } @@ -955,11 +1017,6 @@ static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) DPRINTK("ncp_mkdir: making %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); - error = -EIO; - lock_kernel(); - if (!ncp_conn_valid(server)) - goto out; - ncp_age_dentry(server, dentry); len = sizeof(__name); error = ncp_io2vol(server, __name, &len, dentry->d_name.name, @@ -967,12 +1024,11 @@ static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) if (error) goto out; - error = -EACCES; - if (ncp_open_create_file_or_subdir(server, dir, __name, + error = ncp_open_create_file_or_subdir(server, dir, __name, OC_MODE_CREATE, aDIR, cpu_to_le16(0xffff), - &finfo) == 0) - { + &finfo); + if (error == 0) { if (ncp_is_nfs_extras(server, finfo.volume)) { mode |= S_IFDIR; finfo.i.nfs.mode = mode; @@ -983,9 +1039,10 @@ static int ncp_mkdir(struct inode *dir, struct dentry *dentry, int mode) goto out; } error = ncp_instantiate(dir, dentry, &finfo); + } else if (error > 0) { + error = -EACCES; } out: - unlock_kernel(); return error; } @@ -998,11 +1055,6 @@ static int ncp_rmdir(struct inode *dir, struct dentry *dentry) DPRINTK("ncp_rmdir: removing %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); - error = -EIO; - lock_kernel(); - if (!ncp_conn_valid(server)) - goto out; - error = -EBUSY; if (!d_unhashed(dentry)) goto out; @@ -1036,11 +1088,10 @@ static int ncp_rmdir(struct inode *dir, struct dentry *dentry) error = -ENOENT; break; default: - error = -EACCES; + error = result < 0 ? result : -EACCES; break; } out: - unlock_kernel(); return error; } @@ -1050,15 +1101,10 @@ static int ncp_unlink(struct inode *dir, struct dentry *dentry) struct ncp_server *server; int error; - lock_kernel(); server = NCP_SERVER(dir); DPRINTK("ncp_unlink: unlinking %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); - error = -EIO; - if (!ncp_conn_valid(server)) - goto out; - /* * Check whether to close the file ... */ @@ -1097,12 +1143,9 @@ static int ncp_unlink(struct inode *dir, struct dentry *dentry) error = -ENOENT; break; default: - error = -EACCES; + error = error < 0 ? error : -EACCES; break; } - -out: - unlock_kernel(); return error; } @@ -1118,11 +1161,6 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, old_dentry->d_parent->d_name.name, old_dentry->d_name.name, new_dentry->d_parent->d_name.name, new_dentry->d_name.name); - error = -EIO; - lock_kernel(); - if (!ncp_conn_valid(server)) - goto out; - ncp_age_dentry(server, old_dentry); ncp_age_dentry(server, new_dentry); @@ -1161,11 +1199,10 @@ static int ncp_rename(struct inode *old_dir, struct dentry *old_dentry, error = -ENOENT; break; default: - error = -EACCES; + error = error < 0 ? error : -EACCES; break; } out: - unlock_kernel(); return error; } diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c index 3639cc5..6c754f7 100644 --- a/fs/ncpfs/file.c +++ b/fs/ncpfs/file.c @@ -113,9 +113,6 @@ ncp_file_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) DPRINTK("ncp_file_read: enter %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); - if (!ncp_conn_valid(NCP_SERVER(inode))) - return -EIO; - pos = *ppos; if ((ssize_t) count < 0) { @@ -192,13 +189,11 @@ ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t * DPRINTK("ncp_file_write: enter %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); - if (!ncp_conn_valid(NCP_SERVER(inode))) - return -EIO; if ((ssize_t) count < 0) return -EINVAL; pos = *ppos; if (file->f_flags & O_APPEND) { - pos = inode->i_size; + pos = i_size_read(inode); } if (pos + count > MAX_NON_LFS && !(file->f_flags&O_LARGEFILE)) { @@ -264,8 +259,11 @@ ncp_file_write(struct file *file, const char __user *buf, size_t count, loff_t * *ppos = pos; - if (pos > inode->i_size) { - inode->i_size = pos; + if (pos > i_size_read(inode)) { + mutex_lock(&inode->i_mutex); + if (pos > i_size_read(inode)) + i_size_write(inode, pos); + mutex_unlock(&inode->i_mutex); } DPRINTK("ncp_file_write: exit %s/%s\n", dentry->d_parent->d_name.name, dentry->d_name.name); @@ -281,18 +279,9 @@ static int ncp_release(struct inode *inode, struct file *file) { return 0; } -static loff_t ncp_remote_llseek(struct file *file, loff_t offset, int origin) -{ - loff_t ret; - lock_kernel(); - ret = generic_file_llseek_unlocked(file, offset, origin); - unlock_kernel(); - return ret; -} - const struct file_operations ncp_file_operations = { - .llseek = ncp_remote_llseek, + .llseek = generic_file_llseek, .read = ncp_file_read, .write = ncp_file_write, .unlocked_ioctl = ncp_ioctl, diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c index b4de38c..985fabb 100644 --- a/fs/ncpfs/inode.c +++ b/fs/ncpfs/inode.c @@ -139,7 +139,7 @@ static void ncp_update_dates(struct inode *inode, struct nw_info_struct *nwi) inode->i_mode = nwi->nfs.mode; } - inode->i_blocks = (inode->i_size + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT; + inode->i_blocks = (i_size_read(inode) + NCP_BLOCK_SIZE - 1) >> NCP_BLOCK_SHIFT; inode->i_mtime.tv_sec = ncp_date_dos2unix(nwi->modifyTime, nwi->modifyDate); inode->i_ctime.tv_sec = ncp_date_dos2unix(nwi->creationTime, nwi->creationDate); @@ -158,18 +158,21 @@ static void ncp_update_attrs(struct inode *inode, struct ncp_entry_info *nwinfo) inode->i_mode = server->m.dir_mode; /* for directories dataStreamSize seems to be some Object ID ??? */ - inode->i_size = NCP_BLOCK_SIZE; + i_size_write(inode, NCP_BLOCK_SIZE); } else { + u32 size; + inode->i_mode = server->m.file_mode; - inode->i_size = le32_to_cpu(nwi->dataStreamSize); + size = le32_to_cpu(nwi->dataStreamSize); + i_size_write(inode, size); #ifdef CONFIG_NCPFS_EXTRAS if ((server->m.flags & (NCP_MOUNT_EXTRAS|NCP_MOUNT_SYMLINKS)) && (nwi->attributes & aSHARED)) { switch (nwi->attributes & (aHIDDEN|aSYSTEM)) { case aHIDDEN: if (server->m.flags & NCP_MOUNT_SYMLINKS) { - if (/* (inode->i_size >= NCP_MIN_SYMLINK_SIZE) - && */ (inode->i_size <= NCP_MAX_SYMLINK_SIZE)) { + if (/* (size >= NCP_MIN_SYMLINK_SIZE) + && */ (size <= NCP_MAX_SYMLINK_SIZE)) { inode->i_mode = (inode->i_mode & ~S_IFMT) | S_IFLNK; NCP_FINFO(inode)->flags |= NCPI_KLUDGE_SYMLINK; break; @@ -208,7 +211,7 @@ void ncp_update_inode2(struct inode* inode, struct ncp_entry_info *nwinfo) } /* - * Fill in the inode based on the ncp_entry_info structure. + * Fill in the inode based on the ncp_entry_info structure. Used only for brand new inodes. */ static void ncp_set_attr(struct inode *inode, struct ncp_entry_info *nwinfo) { @@ -254,6 +257,7 @@ ncp_iget(struct super_block *sb, struct ncp_entry_info *info) if (inode) { atomic_set(&NCP_FINFO(inode)->opened, info->opened); + inode->i_mapping->backing_dev_info = sb->s_bdi; inode->i_ino = info->ino; ncp_set_attr(inode, info); if (S_ISREG(inode->i_mode)) { @@ -299,10 +303,12 @@ ncp_evict_inode(struct inode *inode) static void ncp_stop_tasks(struct ncp_server *server) { struct sock* sk = server->ncp_sock->sk; - + + lock_sock(sk); sk->sk_error_report = server->error_report; sk->sk_data_ready = server->data_ready; sk->sk_write_space = server->write_space; + release_sock(sk); del_timer_sync(&server->timeout_tm); flush_scheduled_work(); } @@ -565,10 +571,12 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) /* server->conn_status = 0; */ /* server->root_dentry = NULL; */ /* server->root_setuped = 0; */ + mutex_init(&server->root_setup_lock); #ifdef CONFIG_NCPFS_PACKET_SIGNING /* server->sign_wanted = 0; */ /* server->sign_active = 0; */ #endif + init_rwsem(&server->auth_rwsem); server->auth.auth_type = NCP_AUTH_NONE; /* server->auth.object_name_len = 0; */ /* server->auth.object_name = NULL; */ @@ -593,16 +601,12 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) server->nls_io = load_nls_default(); #endif /* CONFIG_NCPFS_NLS */ - server->dentry_ttl = 0; /* no caching */ + atomic_set(&server->dentry_ttl, 0); /* no caching */ INIT_LIST_HEAD(&server->tx.requests); mutex_init(&server->rcv.creq_mutex); server->tx.creq = NULL; server->rcv.creq = NULL; - server->data_ready = sock->sk->sk_data_ready; - server->write_space = sock->sk->sk_write_space; - server->error_report = sock->sk->sk_error_report; - sock->sk->sk_user_data = server; init_timer(&server->timeout_tm); #undef NCP_PACKET_SIZE @@ -619,6 +623,11 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) if (server->rxbuf == NULL) goto out_txbuf; + lock_sock(sock->sk); + server->data_ready = sock->sk->sk_data_ready; + server->write_space = sock->sk->sk_write_space; + server->error_report = sock->sk->sk_error_report; + sock->sk->sk_user_data = server; sock->sk->sk_data_ready = ncp_tcp_data_ready; sock->sk->sk_error_report = ncp_tcp_error_report; if (sock->type == SOCK_STREAM) { @@ -634,6 +643,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) server->timeout_tm.data = (unsigned long)server; server->timeout_tm.function = ncpdgram_timeout_call; } + release_sock(sock->sk); ncp_lock_server(server); error = ncp_connect(server); @@ -658,8 +668,10 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent) goto out_disconnect; } } + ncp_lock_server(server); if (options & 2) server->sign_wanted = 1; + ncp_unlock_server(server); } else #endif /* CONFIG_NCPFS_PACKET_SIGNING */ @@ -720,6 +732,9 @@ out_nls: unload_nls(server->nls_io); unload_nls(server->nls_vol); #endif + mutex_destroy(&server->rcv.creq_mutex); + mutex_destroy(&server->root_setup_lock); + mutex_destroy(&server->mutex); out_fput2: if (server->info_filp) fput(server->info_filp); @@ -743,8 +758,6 @@ static void ncp_put_super(struct super_block *sb) { struct ncp_server *server = NCP_SBP(sb); - lock_kernel(); - ncp_lock_server(server); ncp_disconnect(server); ncp_unlock_server(server); @@ -756,6 +769,9 @@ static void ncp_put_super(struct super_block *sb) unload_nls(server->nls_vol); unload_nls(server->nls_io); #endif /* CONFIG_NCPFS_NLS */ + mutex_destroy(&server->rcv.creq_mutex); + mutex_destroy(&server->root_setup_lock); + mutex_destroy(&server->mutex); if (server->info_filp) fput(server->info_filp); @@ -771,8 +787,6 @@ static void ncp_put_super(struct super_block *sb) vfree(server->packet); sb->s_fs_info = NULL; kfree(server); - - unlock_kernel(); } static int ncp_statfs(struct dentry *dentry, struct kstatfs *buf) @@ -851,10 +865,8 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr) result = -EIO; - lock_kernel(); - server = NCP_SERVER(inode); - if ((!server) || !ncp_conn_valid(server)) + if (!server) /* How this could happen? */ goto out; /* ageing the dentry to force validation */ @@ -981,8 +993,6 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr) result = ncp_modify_file_or_subdir_dos_info(NCP_SERVER(inode), inode, info_mask, &info); if (result != 0) { - result = -EACCES; - if (info_mask == (DM_CREATE_TIME | DM_CREATE_DATE)) { /* NetWare seems not to allow this. I do not know why. So, just tell the @@ -1005,7 +1015,8 @@ int ncp_notify_change(struct dentry *dentry, struct iattr *attr) mark_inode_dirty(inode); out: - unlock_kernel(); + if (result > 0) + result = -EACCES; return result; } diff --git a/fs/ncpfs/ioctl.c b/fs/ncpfs/ioctl.c index 84a8cfc..c2a1f9a 100644 --- a/fs/ncpfs/ioctl.c +++ b/fs/ncpfs/ioctl.c @@ -35,16 +35,11 @@ #define NCP_PACKET_SIZE_INTERNAL 65536 static int -ncp_get_fs_info(struct ncp_server * server, struct file *file, +ncp_get_fs_info(struct ncp_server * server, struct inode *inode, struct ncp_fs_info __user *arg) { - struct inode *inode = file->f_path.dentry->d_inode; struct ncp_fs_info info; - if (file_permission(file, MAY_WRITE) != 0 - && current_uid() != server->m.mounted_uid) - return -EACCES; - if (copy_from_user(&info, arg, sizeof(info))) return -EFAULT; @@ -65,16 +60,11 @@ ncp_get_fs_info(struct ncp_server * server, struct file *file, } static int -ncp_get_fs_info_v2(struct ncp_server * server, struct file *file, +ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode, struct ncp_fs_info_v2 __user * arg) { - struct inode *inode = file->f_path.dentry->d_inode; struct ncp_fs_info_v2 info2; - if (file_permission(file, MAY_WRITE) != 0 - && current_uid() != server->m.mounted_uid) - return -EACCES; - if (copy_from_user(&info2, arg, sizeof(info2))) return -EFAULT; @@ -136,16 +126,11 @@ struct compat_ncp_privatedata_ioctl #define NCP_IOC_SETPRIVATEDATA_32 _IOR('n', 10, struct compat_ncp_privatedata_ioctl) static int -ncp_get_compat_fs_info_v2(struct ncp_server * server, struct file *file, +ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode, struct compat_ncp_fs_info_v2 __user * arg) { - struct inode *inode = file->f_path.dentry->d_inode; struct compat_ncp_fs_info_v2 info2; - if (file_permission(file, MAY_WRITE) != 0 - && current_uid() != server->m.mounted_uid) - return -EACCES; - if (copy_from_user(&info2, arg, sizeof(info2))) return -EFAULT; @@ -182,11 +167,8 @@ ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) struct nls_table *iocharset; struct nls_table *oldset_io; struct nls_table *oldset_cp; - - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; - if (server->root_setuped) - return -EBUSY; + int utf8; + int err; if (copy_from_user(&user, arg, sizeof(user))) return -EFAULT; @@ -206,28 +188,40 @@ ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) user.iocharset[NCP_IOCSNAME_LEN] = 0; if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) { iocharset = load_nls_default(); - NCP_CLR_FLAG(server, NCP_FLAG_UTF8); + utf8 = 0; } else if (!strcmp(user.iocharset, "utf8")) { iocharset = load_nls_default(); - NCP_SET_FLAG(server, NCP_FLAG_UTF8); + utf8 = 1; } else { iocharset = load_nls(user.iocharset); if (!iocharset) { unload_nls(codepage); return -EBADRQC; } - NCP_CLR_FLAG(server, NCP_FLAG_UTF8); + utf8 = 0; } - oldset_cp = server->nls_vol; - server->nls_vol = codepage; - oldset_io = server->nls_io; - server->nls_io = iocharset; - + mutex_lock(&server->root_setup_lock); + if (server->root_setuped) { + oldset_cp = codepage; + oldset_io = iocharset; + err = -EBUSY; + } else { + if (utf8) + NCP_SET_FLAG(server, NCP_FLAG_UTF8); + else + NCP_CLR_FLAG(server, NCP_FLAG_UTF8); + oldset_cp = server->nls_vol; + server->nls_vol = codepage; + oldset_io = server->nls_io; + server->nls_io = iocharset; + err = 0; + } + mutex_unlock(&server->root_setup_lock); unload_nls(oldset_cp); unload_nls(oldset_io); - return 0; + return err; } static int @@ -237,6 +231,7 @@ ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) int len; memset(&user, 0, sizeof(user)); + mutex_lock(&server->root_setup_lock); if (server->nls_vol && server->nls_vol->charset) { len = strlen(server->nls_vol->charset); if (len > NCP_IOCSNAME_LEN) @@ -254,6 +249,7 @@ ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) strncpy(user.iocharset, server->nls_io->charset, len); user.iocharset[len] = 0; } + mutex_unlock(&server->root_setup_lock); if (copy_to_user(arg, &user, sizeof(user))) return -EFAULT; @@ -261,25 +257,19 @@ ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg) } #endif /* CONFIG_NCPFS_NLS */ -static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) +static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg) { - struct inode *inode = filp->f_dentry->d_inode; struct ncp_server *server = NCP_SERVER(inode); int result; struct ncp_ioctl_request request; char* bouncebuffer; void __user *argp = (void __user *)arg; - uid_t uid = current_uid(); switch (cmd) { #ifdef CONFIG_COMPAT case NCP_IOC_NCPREQUEST_32: #endif case NCP_IOC_NCPREQUEST: - if (file_permission(filp, MAY_WRITE) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - #ifdef CONFIG_COMPAT if (cmd == NCP_IOC_NCPREQUEST_32) { struct compat_ncp_ioctl_request request32; @@ -314,7 +304,7 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) server->current_size = request.size; memcpy(server->packet, bouncebuffer, request.size); - result = ncp_request2(server, request.function, + result = ncp_request2(server, request.function, bouncebuffer, NCP_PACKET_SIZE_INTERNAL); if (result < 0) result = -EIO; @@ -331,69 +321,69 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) case NCP_IOC_CONN_LOGGED_IN: - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE)) return -EINVAL; + mutex_lock(&server->root_setup_lock); if (server->root_setuped) - return -EBUSY; - server->root_setuped = 1; - return ncp_conn_logged_in(inode->i_sb); + result = -EBUSY; + else { + result = ncp_conn_logged_in(inode->i_sb); + if (result == 0) + server->root_setuped = 1; + } + mutex_unlock(&server->root_setup_lock); + return result; case NCP_IOC_GET_FS_INFO: - return ncp_get_fs_info(server, filp, argp); + return ncp_get_fs_info(server, inode, argp); case NCP_IOC_GET_FS_INFO_V2: - return ncp_get_fs_info_v2(server, filp, argp); + return ncp_get_fs_info_v2(server, inode, argp); #ifdef CONFIG_COMPAT case NCP_IOC_GET_FS_INFO_V2_32: - return ncp_get_compat_fs_info_v2(server, filp, argp); + return ncp_get_compat_fs_info_v2(server, inode, argp); #endif /* we have too many combinations of CONFIG_COMPAT, * CONFIG_64BIT and CONFIG_UID16, so just handle * any of the possible ioctls */ case NCP_IOC_GETMOUNTUID16: - case NCP_IOC_GETMOUNTUID32: - case NCP_IOC_GETMOUNTUID64: - if (file_permission(filp, MAY_READ) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - - if (cmd == NCP_IOC_GETMOUNTUID16) { + { u16 uid; + SET_UID(uid, server->m.mounted_uid); if (put_user(uid, (u16 __user *)argp)) return -EFAULT; - } else if (cmd == NCP_IOC_GETMOUNTUID32) { - if (put_user(server->m.mounted_uid, - (u32 __user *)argp)) - return -EFAULT; - } else { - if (put_user(server->m.mounted_uid, - (u64 __user *)argp)) - return -EFAULT; + return 0; } + case NCP_IOC_GETMOUNTUID32: + if (put_user(server->m.mounted_uid, + (u32 __user *)argp)) + return -EFAULT; + return 0; + case NCP_IOC_GETMOUNTUID64: + if (put_user(server->m.mounted_uid, + (u64 __user *)argp)) + return -EFAULT; return 0; case NCP_IOC_GETROOT: { struct ncp_setroot_ioctl sr; - if (file_permission(filp, MAY_READ) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - + result = -EACCES; + mutex_lock(&server->root_setup_lock); if (server->m.mounted_vol[0]) { struct dentry* dentry = inode->i_sb->s_root; if (dentry) { struct inode* s_inode = dentry->d_inode; - + if (s_inode) { sr.volNumber = NCP_FINFO(s_inode)->volNumber; sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum; sr.namespace = server->name_space[sr.volNumber]; + result = 0; } else DPRINTK("ncpfs: s_root->d_inode==NULL\n"); } else @@ -402,10 +392,12 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) sr.volNumber = -1; sr.namespace = 0; sr.dirEntNum = 0; + result = 0; } - if (copy_to_user(argp, &sr, sizeof(sr))) - return -EFAULT; - return 0; + mutex_unlock(&server->root_setup_lock); + if (!result && copy_to_user(argp, &sr, sizeof(sr))) + result = -EFAULT; + return result; } case NCP_IOC_SETROOT: @@ -416,103 +408,114 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) __le32 dosde; struct dentry* dentry; - if (!capable(CAP_SYS_ADMIN)) - { - return -EACCES; - } - if (server->root_setuped) return -EBUSY; if (copy_from_user(&sr, argp, sizeof(sr))) return -EFAULT; - if (sr.volNumber < 0) { - server->m.mounted_vol[0] = 0; - vnum = NCP_NUMBER_OF_VOLUMES; - de = 0; - dosde = 0; - } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) { - return -EINVAL; - } else if (ncp_mount_subdir(server, sr.volNumber, - sr.namespace, sr.dirEntNum, - &vnum, &de, &dosde)) { - return -ENOENT; - } - - dentry = inode->i_sb->s_root; - server->root_setuped = 1; - if (dentry) { - struct inode* s_inode = dentry->d_inode; - - if (s_inode) { - NCP_FINFO(s_inode)->volNumber = vnum; - NCP_FINFO(s_inode)->dirEntNum = de; - NCP_FINFO(s_inode)->DosDirNum = dosde; + mutex_lock(&server->root_setup_lock); + if (server->root_setuped) + result = -EBUSY; + else { + if (sr.volNumber < 0) { + server->m.mounted_vol[0] = 0; + vnum = NCP_NUMBER_OF_VOLUMES; + de = 0; + dosde = 0; + result = 0; + } else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) { + result = -EINVAL; + } else if (ncp_mount_subdir(server, sr.volNumber, + sr.namespace, sr.dirEntNum, + &vnum, &de, &dosde)) { + result = -ENOENT; } else - DPRINTK("ncpfs: s_root->d_inode==NULL\n"); - } else - DPRINTK("ncpfs: s_root==NULL\n"); + result = 0; + + if (result == 0) { + dentry = inode->i_sb->s_root; + if (dentry) { + struct inode* s_inode = dentry->d_inode; + + if (s_inode) { + NCP_FINFO(s_inode)->volNumber = vnum; + NCP_FINFO(s_inode)->dirEntNum = de; + NCP_FINFO(s_inode)->DosDirNum = dosde; + server->root_setuped = 1; + } else { + DPRINTK("ncpfs: s_root->d_inode==NULL\n"); + result = -EIO; + } + } else { + DPRINTK("ncpfs: s_root==NULL\n"); + result = -EIO; + } + } + result = 0; + } + mutex_unlock(&server->root_setup_lock); - return 0; + return result; } -#ifdef CONFIG_NCPFS_PACKET_SIGNING +#ifdef CONFIG_NCPFS_PACKET_SIGNING case NCP_IOC_SIGN_INIT: - if (file_permission(filp, MAY_WRITE) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - - if (argp) { - if (server->sign_wanted) - { - struct ncp_sign_init sign; + { + struct ncp_sign_init sign; + if (argp) if (copy_from_user(&sign, argp, sizeof(sign))) return -EFAULT; - memcpy(server->sign_root,sign.sign_root,8); - memcpy(server->sign_last,sign.sign_last,16); - server->sign_active = 1; + ncp_lock_server(server); + mutex_lock(&server->rcv.creq_mutex); + if (argp) { + if (server->sign_wanted) { + memcpy(server->sign_root,sign.sign_root,8); + memcpy(server->sign_last,sign.sign_last,16); + server->sign_active = 1; + } + /* ignore when signatures not wanted */ + } else { + server->sign_active = 0; } - /* ignore when signatures not wanted */ - } else { - server->sign_active = 0; + mutex_unlock(&server->rcv.creq_mutex); + ncp_unlock_server(server); + return 0; } - return 0; - + case NCP_IOC_SIGN_WANTED: - if (file_permission(filp, MAY_READ) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - - if (put_user(server->sign_wanted, (int __user *)argp)) - return -EFAULT; - return 0; + { + int state; + + ncp_lock_server(server); + state = server->sign_wanted; + ncp_unlock_server(server); + if (put_user(state, (int __user *)argp)) + return -EFAULT; + return 0; + } case NCP_IOC_SET_SIGN_WANTED: { int newstate; - if (file_permission(filp, MAY_WRITE) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - /* get only low 8 bits... */ if (get_user(newstate, (unsigned char __user *)argp)) return -EFAULT; + result = 0; + ncp_lock_server(server); if (server->sign_active) { /* cannot turn signatures OFF when active */ - if (!newstate) return -EINVAL; + if (!newstate) + result = -EINVAL; } else { server->sign_wanted = newstate != 0; } - return 0; + ncp_unlock_server(server); + return result; } #endif /* CONFIG_NCPFS_PACKET_SIGNING */ #ifdef CONFIG_NCPFS_IOCTL_LOCKING case NCP_IOC_LOCKUNLOCK: - if (file_permission(filp, MAY_WRITE) != 0 - && uid != server->m.mounted_uid) - return -EACCES; - { struct ncp_lock_ioctl rqdata; @@ -541,16 +544,13 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { return result; } - result = -EIO; - if (!ncp_conn_valid(server)) - goto outrel; result = -EISDIR; if (!S_ISREG(inode->i_mode)) goto outrel; if (rqdata.cmd == NCP_LOCK_CLEAR) { result = ncp_ClearPhysicalRecord(NCP_SERVER(inode), - NCP_FINFO(inode)->file_handle, + NCP_FINFO(inode)->file_handle, rqdata.offset, rqdata.length); if (result > 0) result = 0; /* no such lock */ @@ -573,7 +573,7 @@ static long __ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) rqdata.timeout); if (result > 0) result = -EAGAIN; } -outrel: +outrel: ncp_inode_close(inode); return result; } @@ -581,60 +581,62 @@ outrel: #ifdef CONFIG_COMPAT case NCP_IOC_GETOBJECTNAME_32: - if (uid != server->m.mounted_uid) - return -EACCES; { struct compat_ncp_objectname_ioctl user; size_t outl; if (copy_from_user(&user, argp, sizeof(user))) return -EFAULT; + down_read(&server->auth_rwsem); user.auth_type = server->auth.auth_type; outl = user.object_name_len; user.object_name_len = server->auth.object_name_len; if (outl > user.object_name_len) outl = user.object_name_len; + result = 0; if (outl) { if (copy_to_user(compat_ptr(user.object_name), server->auth.object_name, - outl)) return -EFAULT; + outl)) + result = -EFAULT; } - if (copy_to_user(argp, &user, sizeof(user))) - return -EFAULT; - return 0; + up_read(&server->auth_rwsem); + if (!result && copy_to_user(argp, &user, sizeof(user))) + result = -EFAULT; + return result; } #endif case NCP_IOC_GETOBJECTNAME: - if (uid != server->m.mounted_uid) - return -EACCES; { struct ncp_objectname_ioctl user; size_t outl; if (copy_from_user(&user, argp, sizeof(user))) return -EFAULT; + down_read(&server->auth_rwsem); user.auth_type = server->auth.auth_type; outl = user.object_name_len; user.object_name_len = server->auth.object_name_len; if (outl > user.object_name_len) outl = user.object_name_len; + result = 0; if (outl) { if (copy_to_user(user.object_name, server->auth.object_name, - outl)) return -EFAULT; + outl)) + result = -EFAULT; } - if (copy_to_user(argp, &user, sizeof(user))) - return -EFAULT; - return 0; + up_read(&server->auth_rwsem); + if (!result && copy_to_user(argp, &user, sizeof(user))) + result = -EFAULT; + return result; } #ifdef CONFIG_COMPAT case NCP_IOC_SETOBJECTNAME_32: #endif case NCP_IOC_SETOBJECTNAME: - if (uid != server->m.mounted_uid) - return -EACCES; { struct ncp_objectname_ioctl user; void* newname; @@ -666,9 +668,7 @@ outrel: } else { newname = NULL; } - /* enter critical section */ - /* maybe that kfree can sleep so do that this way */ - /* it is at least more SMP friendly (in future...) */ + down_write(&server->auth_rwsem); oldname = server->auth.object_name; oldnamelen = server->auth.object_name_len; oldprivate = server->priv.data; @@ -678,7 +678,7 @@ outrel: server->auth.object_name = newname; server->priv.len = 0; server->priv.data = NULL; - /* leave critical section */ + up_write(&server->auth_rwsem); kfree(oldprivate); kfree(oldname); return 0; @@ -688,8 +688,6 @@ outrel: case NCP_IOC_GETPRIVATEDATA_32: #endif case NCP_IOC_GETPRIVATEDATA: - if (uid != server->m.mounted_uid) - return -EACCES; { struct ncp_privatedata_ioctl user; size_t outl; @@ -706,14 +704,20 @@ outrel: if (copy_from_user(&user, argp, sizeof(user))) return -EFAULT; + down_read(&server->auth_rwsem); outl = user.len; user.len = server->priv.len; if (outl > user.len) outl = user.len; + result = 0; if (outl) { if (copy_to_user(user.data, server->priv.data, - outl)) return -EFAULT; + outl)) + result = -EFAULT; } + up_read(&server->auth_rwsem); + if (result) + return result; #ifdef CONFIG_COMPAT if (cmd == NCP_IOC_GETPRIVATEDATA_32) { struct compat_ncp_privatedata_ioctl user32; @@ -733,8 +737,6 @@ outrel: case NCP_IOC_SETPRIVATEDATA_32: #endif case NCP_IOC_SETPRIVATEDATA: - if (uid != server->m.mounted_uid) - return -EACCES; { struct ncp_privatedata_ioctl user; void* new; @@ -762,12 +764,12 @@ outrel: } else { new = NULL; } - /* enter critical section */ + down_write(&server->auth_rwsem); old = server->priv.data; oldlen = server->priv.len; server->priv.len = user.len; server->priv.data = new; - /* leave critical section */ + up_write(&server->auth_rwsem); kfree(old); return 0; } @@ -775,17 +777,13 @@ outrel: #ifdef CONFIG_NCPFS_NLS case NCP_IOC_SETCHARSETS: return ncp_set_charsets(server, argp); - + case NCP_IOC_GETCHARSETS: return ncp_get_charsets(server, argp); #endif /* CONFIG_NCPFS_NLS */ case NCP_IOC_SETDENTRYTTL: - if (file_permission(filp, MAY_WRITE) != 0 && - uid != server->m.mounted_uid) - return -EACCES; - { u_int32_t user; @@ -795,13 +793,13 @@ outrel: if (user > 20000) return -EINVAL; user = (user * HZ) / 1000; - server->dentry_ttl = user; + atomic_set(&server->dentry_ttl, user); return 0; } - + case NCP_IOC_GETDENTRYTTL: { - u_int32_t user = (server->dentry_ttl * 1000) / HZ; + u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ; if (copy_to_user(argp, &user, sizeof(user))) return -EFAULT; return 0; @@ -811,59 +809,103 @@ outrel: return -EINVAL; } -static int ncp_ioctl_need_write(unsigned int cmd) +long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { + struct inode *inode = filp->f_dentry->d_inode; + struct ncp_server *server = NCP_SERVER(inode); + uid_t uid = current_uid(); + int need_drop_write = 0; + long ret; + switch (cmd) { - case NCP_IOC_GET_FS_INFO: - case NCP_IOC_GET_FS_INFO_V2: - case NCP_IOC_NCPREQUEST: - case NCP_IOC_SETDENTRYTTL: - case NCP_IOC_SIGN_INIT: - case NCP_IOC_LOCKUNLOCK: - case NCP_IOC_SET_SIGN_WANTED: - return 1; - case NCP_IOC_GETOBJECTNAME: - case NCP_IOC_SETOBJECTNAME: - case NCP_IOC_GETPRIVATEDATA: - case NCP_IOC_SETPRIVATEDATA: case NCP_IOC_SETCHARSETS: - case NCP_IOC_GETCHARSETS: case NCP_IOC_CONN_LOGGED_IN: - case NCP_IOC_GETDENTRYTTL: - case NCP_IOC_GETMOUNTUID2: - case NCP_IOC_SIGN_WANTED: - case NCP_IOC_GETROOT: case NCP_IOC_SETROOT: - return 0; - default: - /* unknown IOCTL command, assume write */ - return 1; + if (!capable(CAP_SYS_ADMIN)) { + ret = -EACCES; + goto out; + } + break; } -} - -long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) -{ - long ret; - - lock_kernel(); - if (ncp_ioctl_need_write(cmd)) { + if (server->m.mounted_uid != uid) { + switch (cmd) { /* - * inside the ioctl(), any failures which - * are because of file_permission() are - * -EACCESS, so it seems consistent to keep - * that here. + * Only mount owner can issue these ioctls. Information + * necessary to authenticate to other NDS servers are + * stored here. */ - if (mnt_want_write(filp->f_path.mnt)) { + case NCP_IOC_GETOBJECTNAME: + case NCP_IOC_SETOBJECTNAME: + case NCP_IOC_GETPRIVATEDATA: + case NCP_IOC_SETPRIVATEDATA: +#ifdef CONFIG_COMPAT + case NCP_IOC_GETOBJECTNAME_32: + case NCP_IOC_SETOBJECTNAME_32: + case NCP_IOC_GETPRIVATEDATA_32: + case NCP_IOC_SETPRIVATEDATA_32: +#endif ret = -EACCES; goto out; + /* + * These require write access on the inode if user id + * does not match. Note that they do not write to the + * file... But old code did mnt_want_write, so I keep + * it as is. Of course not for mountpoint owner, as + * that breaks read-only mounts altogether as ncpmount + * needs working NCP_IOC_NCPREQUEST and + * NCP_IOC_GET_FS_INFO. Some of these codes (setdentryttl, + * signinit, setsignwanted) should be probably restricted + * to owner only, or even more to CAP_SYS_ADMIN). + */ + case NCP_IOC_GET_FS_INFO: + case NCP_IOC_GET_FS_INFO_V2: + case NCP_IOC_NCPREQUEST: + case NCP_IOC_SETDENTRYTTL: + case NCP_IOC_SIGN_INIT: + case NCP_IOC_LOCKUNLOCK: + case NCP_IOC_SET_SIGN_WANTED: +#ifdef CONFIG_COMPAT + case NCP_IOC_GET_FS_INFO_V2_32: + case NCP_IOC_NCPREQUEST_32: +#endif + ret = mnt_want_write_file(filp); + if (ret) + goto out; + need_drop_write = 1; + ret = inode_permission(inode, MAY_WRITE); + if (ret) + goto outDropWrite; + break; + /* + * Read access required. + */ + case NCP_IOC_GETMOUNTUID16: + case NCP_IOC_GETMOUNTUID32: + case NCP_IOC_GETMOUNTUID64: + case NCP_IOC_GETROOT: + case NCP_IOC_SIGN_WANTED: + ret = inode_permission(inode, MAY_READ); + if (ret) + goto out; + break; + /* + * Anybody can read these. + */ + case NCP_IOC_GETCHARSETS: + case NCP_IOC_GETDENTRYTTL: + default: + /* Three codes below are protected by CAP_SYS_ADMIN above. */ + case NCP_IOC_SETCHARSETS: + case NCP_IOC_CONN_LOGGED_IN: + case NCP_IOC_SETROOT: + break; } } - ret = __ncp_ioctl(filp, cmd, arg); - if (ncp_ioctl_need_write(cmd)) + ret = __ncp_ioctl(inode, cmd, arg); +outDropWrite: + if (need_drop_write) mnt_drop_write(filp->f_path.mnt); - out: - unlock_kernel(); return ret; } @@ -872,10 +914,8 @@ long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { long ret; - lock_kernel(); arg = (unsigned long) compat_ptr(arg); ret = ncp_ioctl(file, cmd, arg); - unlock_kernel(); return ret; } #endif diff --git a/fs/ncpfs/ncplib_kernel.c b/fs/ncpfs/ncplib_kernel.c index 0ec6237..a95615a 100644 --- a/fs/ncpfs/ncplib_kernel.c +++ b/fs/ncpfs/ncplib_kernel.c @@ -107,17 +107,17 @@ ncp_reply_data(struct ncp_server *server, int offset) return &(server->packet[sizeof(struct ncp_reply_header) + offset]); } -static inline u8 BVAL(void *data) +static inline u8 BVAL(const void *data) { - return *(u8 *)data; + return *(const u8 *)data; } static u8 ncp_reply_byte(struct ncp_server *server, int offset) { - return *(u8 *)ncp_reply_data(server, offset); + return *(const u8 *)ncp_reply_data(server, offset); } -static inline u16 WVAL_LH(void *data) +static inline u16 WVAL_LH(const void *data) { return get_unaligned_le16(data); } @@ -134,7 +134,7 @@ ncp_reply_be16(struct ncp_server *server, int offset) return get_unaligned_be16(ncp_reply_data(server, offset)); } -static inline u32 DVAL_LH(void *data) +static inline u32 DVAL_LH(const void *data) { return get_unaligned_le32(data); } @@ -349,9 +349,9 @@ int ncp_dirhandle_free(struct ncp_server* server, __u8 dirhandle) { return result; } -void ncp_extract_file_info(void *structure, struct nw_info_struct *target) +void ncp_extract_file_info(const void *structure, struct nw_info_struct *target) { - __u8 *name_len; + const __u8 *name_len; const int info_struct_size = offsetof(struct nw_info_struct, nameLen); memcpy(target, structure, info_struct_size); @@ -364,7 +364,7 @@ void ncp_extract_file_info(void *structure, struct nw_info_struct *target) } #ifdef CONFIG_NCPFS_NFS_NS -static inline void ncp_extract_nfs_info(unsigned char *structure, +static inline void ncp_extract_nfs_info(const unsigned char *structure, struct nw_nfs_info *target) { target->mode = DVAL_LH(structure); @@ -417,7 +417,7 @@ int ncp_obtain_nfs_info(struct ncp_server *server, * Returns information for a (one-component) name relative to * the specified directory. */ -int ncp_obtain_info(struct ncp_server *server, struct inode *dir, char *path, +int ncp_obtain_info(struct ncp_server *server, struct inode *dir, const char *path, struct nw_info_struct *target) { __u8 volnum = NCP_FINFO(dir)->volNumber; @@ -452,16 +452,16 @@ out: #ifdef CONFIG_NCPFS_NFS_NS static int ncp_obtain_DOS_dir_base(struct ncp_server *server, - __u8 volnum, __le32 dirent, - char *path, /* At most 1 component */ + __u8 ns, __u8 volnum, __le32 dirent, + const char *path, /* At most 1 component */ __le32 *DOS_dir_base) { int result; ncp_init_request(server); ncp_add_byte(server, 6); /* subfunction */ - ncp_add_byte(server, server->name_space[volnum]); - ncp_add_byte(server, server->name_space[volnum]); + ncp_add_byte(server, ns); + ncp_add_byte(server, ns); ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */ ncp_add_dword(server, RIM_DIRECTORY); ncp_add_handle_path(server, volnum, dirent, 1, path); @@ -523,10 +523,27 @@ ncp_get_known_namespace(struct ncp_server *server, __u8 volume) #endif /* defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS) */ } +int +ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns) +{ + int ns = ncp_get_known_namespace(server, volume); + + if (ret_ns) + *ret_ns = ns; + + DPRINTK("lookup_vol: namespace[%d] = %d\n", + volume, server->name_space[volume]); + + if (server->name_space[volume] == ns) + return 0; + server->name_space[volume] = ns; + return 1; +} + static int ncp_ObtainSpecificDirBase(struct ncp_server *server, __u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base, - char *path, /* At most 1 component */ + const char *path, /* At most 1 component */ __le32 *dirEntNum, __le32 *DosDirNum) { int result; @@ -560,14 +577,13 @@ ncp_mount_subdir(struct ncp_server *server, { int dstNS; int result; - - dstNS = ncp_get_known_namespace(server, volNumber); + + ncp_update_known_namespace(server, volNumber, &dstNS); if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber, dirEntNum, NULL, newDirEnt, newDosEnt)) != 0) { return result; } - server->name_space[volNumber] = dstNS; *volume = volNumber; server->m.mounted_vol[1] = 0; server->m.mounted_vol[0] = 'X'; @@ -575,11 +591,10 @@ ncp_mount_subdir(struct ncp_server *server, } int -ncp_get_volume_root(struct ncp_server *server, const char *volname, - __u32* volume, __le32* dirent, __le32* dosdirent) +ncp_get_volume_root(struct ncp_server *server, + const char *volname, __u32* volume, __le32* dirent, __le32* dosdirent) { int result; - __u8 volnum; DPRINTK("ncp_get_volume_root: looking up vol %s\n", volname); @@ -601,21 +616,14 @@ ncp_get_volume_root(struct ncp_server *server, const char *volname, return result; } *dirent = *dosdirent = ncp_reply_dword(server, 4); - volnum = ncp_reply_byte(server, 8); + *volume = ncp_reply_byte(server, 8); ncp_unlock_server(server); - *volume = volnum; - - server->name_space[volnum] = ncp_get_known_namespace(server, volnum); - - DPRINTK("lookup_vol: namespace[%d] = %d\n", - volnum, server->name_space[volnum]); - return 0; } int -ncp_lookup_volume(struct ncp_server *server, const char *volname, - struct nw_info_struct *target) +ncp_lookup_volume(struct ncp_server *server, + const char *volname, struct nw_info_struct *target) { int result; @@ -625,6 +633,7 @@ ncp_lookup_volume(struct ncp_server *server, const char *volname, if (result) { return result; } + ncp_update_known_namespace(server, target->volNumber, NULL); target->nameLen = strlen(volname); memcpy(target->entryName, volname, target->nameLen+1); target->attributes = aDIR; @@ -676,8 +685,8 @@ int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent, { int result = 0; + ncp_init_request(server); if (server->name_space[volnum] == NW_NS_NFS) { - ncp_init_request(server); ncp_add_byte(server, 25); /* subfunction */ ncp_add_byte(server, server->name_space[volnum]); ncp_add_byte(server, NW_NS_NFS); @@ -690,8 +699,8 @@ int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent, ncp_add_dword_lh(server, 1); /* nlinks */ ncp_add_dword_lh(server, rdev); result = ncp_request(server, 87); - ncp_unlock_server(server); } + ncp_unlock_server(server); return result; } #endif @@ -700,7 +709,7 @@ int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent, static int ncp_DeleteNSEntry(struct ncp_server *server, __u8 have_dir_base, __u8 volnum, __le32 dirent, - char* name, __u8 ns, __le16 attr) + const char* name, __u8 ns, __le16 attr) { int result; @@ -734,23 +743,25 @@ ncp_del_file_or_subdir2(struct ncp_server *server, int ncp_del_file_or_subdir(struct ncp_server *server, - struct inode *dir, char *name) + struct inode *dir, const char *name) { __u8 volnum = NCP_FINFO(dir)->volNumber; __le32 dirent = NCP_FINFO(dir)->dirEntNum; + int name_space; + name_space = server->name_space[volnum]; #ifdef CONFIG_NCPFS_NFS_NS - if (server->name_space[volnum]==NW_NS_NFS) + if (name_space == NW_NS_NFS) { int result; - result=ncp_obtain_DOS_dir_base(server, volnum, dirent, name, &dirent); + result=ncp_obtain_DOS_dir_base(server, name_space, volnum, dirent, name, &dirent); if (result) return result; - return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006)); + name = NULL; + name_space = NW_NS_DOS; } - else #endif /* CONFIG_NCPFS_NFS_NS */ - return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, server->name_space[volnum], cpu_to_le16(0x8006)); + return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, name_space, cpu_to_le16(0x8006)); } static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6]) @@ -765,7 +776,7 @@ static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6]) /* If both dir and name are NULL, then in target there's already a looked-up entry that wants to be opened. */ int ncp_open_create_file_or_subdir(struct ncp_server *server, - struct inode *dir, char *name, + struct inode *dir, const char *name, int open_create_mode, __le32 create_attributes, __le16 desired_acc_rights, @@ -890,8 +901,8 @@ int ncp_search_for_fileset(struct ncp_server *server, static int ncp_RenameNSEntry(struct ncp_server *server, - struct inode *old_dir, char *old_name, __le16 old_type, - struct inode *new_dir, char *new_name) + struct inode *old_dir, const char *old_name, __le16 old_type, + struct inode *new_dir, const char *new_name) { int result = -EINVAL; @@ -929,8 +940,8 @@ out: } int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server, - struct inode *old_dir, char *old_name, - struct inode *new_dir, char *new_name) + struct inode *old_dir, const char *old_name, + struct inode *new_dir, const char *new_name) { int result; __le16 old_type = cpu_to_le16(0x06); @@ -958,7 +969,7 @@ int ncp_read_kernel(struct ncp_server *server, const char *file_id, __u32 offset, __u16 to_read, char *target, int *bytes_read) { - char *source; + const char *source; int result; ncp_init_request(server); diff --git a/fs/ncpfs/ncplib_kernel.h b/fs/ncpfs/ncplib_kernel.h index 2441d1a..3c57eca 100644 --- a/fs/ncpfs/ncplib_kernel.h +++ b/fs/ncpfs/ncplib_kernel.h @@ -65,10 +65,11 @@ static inline void ncp_inode_close(struct inode *inode) { atomic_dec(&NCP_FINFO(inode)->opened); } -void ncp_extract_file_info(void* src, struct nw_info_struct* target); -int ncp_obtain_info(struct ncp_server *server, struct inode *, char *, +void ncp_extract_file_info(const void* src, struct nw_info_struct* target); +int ncp_obtain_info(struct ncp_server *server, struct inode *, const char *, struct nw_info_struct *target); int ncp_obtain_nfs_info(struct ncp_server *server, struct nw_info_struct *target); +int ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns); int ncp_get_volume_root(struct ncp_server *server, const char *volname, __u32 *volume, __le32 *dirent, __le32 *dosdirent); int ncp_lookup_volume(struct ncp_server *, const char *, struct nw_info_struct *); @@ -80,8 +81,8 @@ int ncp_modify_nfs_info(struct ncp_server *, __u8 volnum, __le32 dirent, __u32 mode, __u32 rdev); int ncp_del_file_or_subdir2(struct ncp_server *, struct dentry*); -int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, char *); -int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, char *, +int ncp_del_file_or_subdir(struct ncp_server *, struct inode *, const char *); +int ncp_open_create_file_or_subdir(struct ncp_server *, struct inode *, const char *, int, __le32, __le16, struct ncp_entry_info *); int ncp_initialize_search(struct ncp_server *, struct inode *, @@ -93,7 +94,7 @@ int ncp_search_for_fileset(struct ncp_server *server, char** rbuf, size_t* rsize); int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server, - struct inode *, char *, struct inode *, char *); + struct inode *, const char *, struct inode *, const char *); int @@ -170,13 +171,13 @@ static inline int ncp_strnicmp(struct nls_table *t, const unsigned char *s1, #endif /* CONFIG_NCPFS_NLS */ #define NCP_GET_AGE(dentry) (jiffies - (dentry)->d_time) -#define NCP_MAX_AGE(server) ((server)->dentry_ttl) +#define NCP_MAX_AGE(server) atomic_read(&(server)->dentry_ttl) #define NCP_TEST_AGE(server,dentry) (NCP_GET_AGE(dentry) < NCP_MAX_AGE(server)) static inline void ncp_age_dentry(struct ncp_server* server, struct dentry* dentry) { - dentry->d_time = jiffies - server->dentry_ttl; + dentry->d_time = jiffies - NCP_MAX_AGE(server); } static inline void diff --git a/fs/ncpfs/ncpsign_kernel.c b/fs/ncpfs/ncpsign_kernel.c index 7c0b5c2..d8b2d7e 100644 --- a/fs/ncpfs/ncpsign_kernel.c +++ b/fs/ncpfs/ncpsign_kernel.c @@ -15,21 +15,21 @@ /* i386: 32-bit, little endian, handles mis-alignment */ #ifdef __i386__ -#define GET_LE32(p) (*(int *)(p)) +#define GET_LE32(p) (*(const int *)(p)) #define PUT_LE32(p,v) { *(int *)(p)=v; } #else /* from include/ncplib.h */ -#define BVAL(buf,pos) (((__u8 *)(buf))[pos]) +#define BVAL(buf,pos) (((const __u8 *)(buf))[pos]) #define PVAL(buf,pos) ((unsigned)BVAL(buf,pos)) -#define BSET(buf,pos,val) (BVAL(buf,pos) = (val)) +#define BSET(buf,pos,val) (((__u8 *)(buf))[pos] = (val)) static inline __u16 -WVAL_LH(__u8 * buf, int pos) +WVAL_LH(const __u8 * buf, int pos) { return PVAL(buf, pos) | PVAL(buf, pos + 1) << 8; } static inline __u32 -DVAL_LH(__u8 * buf, int pos) +DVAL_LH(const __u8 * buf, int pos) { return WVAL_LH(buf, pos) | WVAL_LH(buf, pos + 2) << 16; } diff --git a/fs/ncpfs/sock.c b/fs/ncpfs/sock.c index c7ff6c7..668bd26 100644 --- a/fs/ncpfs/sock.c +++ b/fs/ncpfs/sock.c @@ -746,7 +746,6 @@ static int ncp_do_request(struct ncp_server *server, int size, return -EIO; } if (!ncp_conn_valid(server)) { - printk(KERN_ERR "ncpfs: Connection invalid!\n"); return -EIO; } { |