diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 15:50:59 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 15:50:59 (GMT) |
commit | 251a8cfeda7c8a0ff26c62659a2358d3b4ff32df (patch) | |
tree | 8bff8895744c4eb159124a62750e89dadd9d17f8 | |
parent | 70f2836d023237868f2fef3625da84643e5aaf33 (diff) | |
parent | f94ec0c0594ef73ab3a2f1f32735aca8ddaf65e2 (diff) | |
download | linux-251a8cfeda7c8a0ff26c62659a2358d3b4ff32df.tar.xz |
Merge tag 'please-pull-pstore_mevent' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux
Pull pstore fixes from Tony Luck:
"Patch series to allow EFI variable backend to pstore to hold multiple
records."
* tag 'please-pull-pstore_mevent' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux:
efi_pstore: Add a format check for an existing variable name at erasing time
efi_pstore: Add a format check for an existing variable name at reading time
efi_pstore: Add a sequence counter to a variable name
efi_pstore: Add ctime to argument of erase callback
efi_pstore: Remove a logic erasing entries from a write callback to hold multiple logs
efi_pstore: Add a logic erasing entries to an erase callback
efi_pstore: Check remaining space with QueryVariableInfo() before writing data
-rw-r--r-- | drivers/acpi/apei/erst.c | 16 | ||||
-rw-r--r-- | drivers/firmware/efivars.c | 163 | ||||
-rw-r--r-- | fs/pstore/inode.c | 7 | ||||
-rw-r--r-- | fs/pstore/internal.h | 2 | ||||
-rw-r--r-- | fs/pstore/platform.c | 13 | ||||
-rw-r--r-- | fs/pstore/ram.c | 9 | ||||
-rw-r--r-- | include/linux/efi.h | 1 | ||||
-rw-r--r-- | include/linux/pstore.h | 6 |
8 files changed, 144 insertions, 73 deletions
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c index e4d9d24..6d894bf 100644 --- a/drivers/acpi/apei/erst.c +++ b/drivers/acpi/apei/erst.c @@ -931,14 +931,14 @@ static int erst_check_table(struct acpi_table_erst *erst_tab) static int erst_open_pstore(struct pstore_info *psi); static int erst_close_pstore(struct pstore_info *psi); -static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, +static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, char **buf, struct pstore_info *psi); static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason, - u64 *id, unsigned int part, + u64 *id, unsigned int part, int count, size_t size, struct pstore_info *psi); -static int erst_clearer(enum pstore_type_id type, u64 id, - struct pstore_info *psi); +static int erst_clearer(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi); static struct pstore_info erst_info = { .owner = THIS_MODULE, @@ -987,7 +987,7 @@ static int erst_close_pstore(struct pstore_info *psi) return 0; } -static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, +static ssize_t erst_reader(u64 *id, enum pstore_type_id *type, int *count, struct timespec *time, char **buf, struct pstore_info *psi) { @@ -1055,7 +1055,7 @@ out: } static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason, - u64 *id, unsigned int part, + u64 *id, unsigned int part, int count, size_t size, struct pstore_info *psi) { struct cper_pstore_record *rcd = (struct cper_pstore_record *) @@ -1101,8 +1101,8 @@ static int erst_writer(enum pstore_type_id type, enum kmsg_dump_reason reason, return ret; } -static int erst_clearer(enum pstore_type_id type, u64 id, - struct pstore_info *psi) +static int erst_clearer(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi) { return erst_clear(id); } diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c index d10c987..6e51c1e 100644 --- a/drivers/firmware/efivars.c +++ b/drivers/firmware/efivars.c @@ -658,13 +658,14 @@ static int efi_pstore_close(struct pstore_info *psi) } static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, - struct timespec *timespec, + int *count, struct timespec *timespec, char **buf, struct pstore_info *psi) { efi_guid_t vendor = LINUX_EFI_CRASH_GUID; struct efivars *efivars = psi->data; char name[DUMP_NAME_LEN]; int i; + int cnt; unsigned int part, size; unsigned long time; @@ -674,21 +675,41 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, for (i = 0; i < DUMP_NAME_LEN; i++) { name[i] = efivars->walk_entry->var.VariableName[i]; } - if (sscanf(name, "dump-type%u-%u-%lu", type, &part, &time) == 3) { + if (sscanf(name, "dump-type%u-%u-%d-%lu", + type, &part, &cnt, &time) == 4) { + *id = part; + *count = cnt; + timespec->tv_sec = time; + timespec->tv_nsec = 0; + } else if (sscanf(name, "dump-type%u-%u-%lu", + type, &part, &time) == 3) { + /* + * Check if an old format, + * which doesn't support holding + * multiple logs, remains. + */ *id = part; + *count = 0; timespec->tv_sec = time; timespec->tv_nsec = 0; - get_var_data_locked(efivars, &efivars->walk_entry->var); - size = efivars->walk_entry->var.DataSize; - *buf = kmalloc(size, GFP_KERNEL); - if (*buf == NULL) - return -ENOMEM; - memcpy(*buf, efivars->walk_entry->var.Data, - size); - efivars->walk_entry = list_entry(efivars->walk_entry->list.next, - struct efivar_entry, list); - return size; + } else { + efivars->walk_entry = list_entry( + efivars->walk_entry->list.next, + struct efivar_entry, list); + continue; } + + get_var_data_locked(efivars, &efivars->walk_entry->var); + size = efivars->walk_entry->var.DataSize; + *buf = kmalloc(size, GFP_KERNEL); + if (*buf == NULL) + return -ENOMEM; + memcpy(*buf, efivars->walk_entry->var.Data, + size); + efivars->walk_entry = list_entry( + efivars->walk_entry->list.next, + struct efivar_entry, list); + return size; } efivars->walk_entry = list_entry(efivars->walk_entry->list.next, struct efivar_entry, list); @@ -698,26 +719,77 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, static int efi_pstore_write(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, - unsigned int part, size_t size, struct pstore_info *psi) + unsigned int part, int count, size_t size, + struct pstore_info *psi) { char name[DUMP_NAME_LEN]; - char stub_name[DUMP_NAME_LEN]; efi_char16_t efi_name[DUMP_NAME_LEN]; efi_guid_t vendor = LINUX_EFI_CRASH_GUID; struct efivars *efivars = psi->data; - struct efivar_entry *entry, *found = NULL; int i, ret = 0; + u64 storage_space, remaining_space, max_variable_size; + efi_status_t status = EFI_NOT_FOUND; + + spin_lock(&efivars->lock); + + /* + * Check if there is a space enough to log. + * size: a size of logging data + * DUMP_NAME_LEN * 2: a maximum size of variable name + */ + status = efivars->ops->query_variable_info(PSTORE_EFI_ATTRIBUTES, + &storage_space, + &remaining_space, + &max_variable_size); + if (status || remaining_space < size + DUMP_NAME_LEN * 2) { + spin_unlock(&efivars->lock); + *id = part; + return -ENOSPC; + } + + sprintf(name, "dump-type%u-%u-%d-%lu", type, part, count, + get_seconds()); + + for (i = 0; i < DUMP_NAME_LEN; i++) + efi_name[i] = name[i]; + + efivars->ops->set_variable(efi_name, &vendor, PSTORE_EFI_ATTRIBUTES, + size, psi->buf); + + spin_unlock(&efivars->lock); + + if (size) + ret = efivar_create_sysfs_entry(efivars, + utf16_strsize(efi_name, + DUMP_NAME_LEN * 2), + efi_name, &vendor); + + *id = part; + return ret; +}; + +static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi) +{ + char name[DUMP_NAME_LEN]; + efi_char16_t efi_name[DUMP_NAME_LEN]; + char name_old[DUMP_NAME_LEN]; + efi_char16_t efi_name_old[DUMP_NAME_LEN]; + efi_guid_t vendor = LINUX_EFI_CRASH_GUID; + struct efivars *efivars = psi->data; + struct efivar_entry *entry, *found = NULL; + int i; - sprintf(stub_name, "dump-type%u-%u-", type, part); - sprintf(name, "%s%lu", stub_name, get_seconds()); + sprintf(name, "dump-type%u-%u-%d-%lu", type, (unsigned int)id, count, + time.tv_sec); spin_lock(&efivars->lock); for (i = 0; i < DUMP_NAME_LEN; i++) - efi_name[i] = stub_name[i]; + efi_name[i] = name[i]; /* - * Clean up any entries with the same name + * Clean up an entry with the same name */ list_for_each_entry(entry, &efivars->list, list) { @@ -726,11 +798,22 @@ static int efi_pstore_write(enum pstore_type_id type, if (efi_guidcmp(entry->var.VendorGuid, vendor)) continue; if (utf16_strncmp(entry->var.VariableName, efi_name, - utf16_strlen(efi_name))) - continue; - /* Needs to be a prefix */ - if (entry->var.VariableName[utf16_strlen(efi_name)] == 0) - continue; + utf16_strlen(efi_name))) { + /* + * Check if an old format, + * which doesn't support holding + * multiple logs, remains. + */ + sprintf(name_old, "dump-type%u-%u-%lu", type, + (unsigned int)id, time.tv_sec); + + for (i = 0; i < DUMP_NAME_LEN; i++) + efi_name_old[i] = name_old[i]; + + if (utf16_strncmp(entry->var.VariableName, efi_name_old, + utf16_strlen(efi_name_old))) + continue; + } /* found */ found = entry; @@ -738,37 +821,17 @@ static int efi_pstore_write(enum pstore_type_id type, &entry->var.VendorGuid, PSTORE_EFI_ATTRIBUTES, 0, NULL); + break; } if (found) list_del(&found->list); - for (i = 0; i < DUMP_NAME_LEN; i++) - efi_name[i] = name[i]; - - efivars->ops->set_variable(efi_name, &vendor, PSTORE_EFI_ATTRIBUTES, - size, psi->buf); - spin_unlock(&efivars->lock); if (found) efivar_unregister(found); - if (size) - ret = efivar_create_sysfs_entry(efivars, - utf16_strsize(efi_name, - DUMP_NAME_LEN * 2), - efi_name, &vendor); - - *id = part; - return ret; -}; - -static int efi_pstore_erase(enum pstore_type_id type, u64 id, - struct pstore_info *psi) -{ - efi_pstore_write(type, 0, &id, (unsigned int)id, 0, psi); - return 0; } #else @@ -782,7 +845,7 @@ static int efi_pstore_close(struct pstore_info *psi) return 0; } -static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, +static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, int *count, struct timespec *timespec, char **buf, struct pstore_info *psi) { @@ -791,13 +854,14 @@ static ssize_t efi_pstore_read(u64 *id, enum pstore_type_id *type, static int efi_pstore_write(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, - unsigned int part, size_t size, struct pstore_info *psi) + unsigned int part, int count, size_t size, + struct pstore_info *psi) { return 0; } -static int efi_pstore_erase(enum pstore_type_id type, u64 id, - struct pstore_info *psi) +static int efi_pstore_erase(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi) { return 0; } @@ -1237,6 +1301,7 @@ efivars_init(void) ops.get_variable = efi.get_variable; ops.set_variable = efi.set_variable; ops.get_next_variable = efi.get_next_variable; + ops.query_variable_info = efi.query_variable_info; error = register_efivars(&__efivars, &ops, efi_kobj); if (error) goto err_put; diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index 4ab572e..ed1d8c7 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -49,6 +49,7 @@ struct pstore_private { struct pstore_info *psi; enum pstore_type_id type; u64 id; + int count; ssize_t size; char data[]; }; @@ -175,7 +176,8 @@ static int pstore_unlink(struct inode *dir, struct dentry *dentry) struct pstore_private *p = dentry->d_inode->i_private; if (p->psi->erase) - p->psi->erase(p->type, p->id, p->psi); + p->psi->erase(p->type, p->id, p->count, + dentry->d_inode->i_ctime, p->psi); return simple_unlink(dir, dentry); } @@ -270,7 +272,7 @@ int pstore_is_mounted(void) * Load it up with "size" bytes of data from "buf". * Set the mtime & ctime to the date that this record was originally stored. */ -int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, +int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count, char *data, size_t size, struct timespec time, struct pstore_info *psi) { @@ -306,6 +308,7 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, goto fail_alloc; private->type = type; private->id = id; + private->count = count; private->psi = psi; switch (type) { diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index 4847f58..937d820 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -50,7 +50,7 @@ extern struct pstore_info *psinfo; extern void pstore_set_kmsg_bytes(int); extern void pstore_get_records(int); extern int pstore_mkfile(enum pstore_type_id, char *psname, u64 id, - char *data, size_t size, + int count, char *data, size_t size, struct timespec time, struct pstore_info *psi); extern int pstore_is_mounted(void); diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 947fbe0..5ea2e77 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -136,7 +136,7 @@ static void pstore_dump(struct kmsg_dumper *dumper, break; ret = psinfo->write(PSTORE_TYPE_DMESG, reason, &id, part, - hsize + len, psinfo); + oopscount, hsize + len, psinfo); if (ret == 0 && reason == KMSG_DUMP_OOPS && pstore_is_mounted()) pstore_new_entry = 1; @@ -173,7 +173,7 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c) spin_lock_irqsave(&psinfo->buf_lock, flags); } memcpy(psinfo->buf, s, c); - psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, c, psinfo); + psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, c, psinfo); spin_unlock_irqrestore(&psinfo->buf_lock, flags); s += c; c = e - s; @@ -197,7 +197,7 @@ static void pstore_register_console(void) {} static int pstore_write_compat(enum pstore_type_id type, enum kmsg_dump_reason reason, - u64 *id, unsigned int part, + u64 *id, unsigned int part, int count, size_t size, struct pstore_info *psi) { return psi->write_buf(type, reason, id, part, psinfo->buf, size, psi); @@ -267,6 +267,7 @@ void pstore_get_records(int quiet) char *buf = NULL; ssize_t size; u64 id; + int count; enum pstore_type_id type; struct timespec time; int failed = 0, rc; @@ -278,9 +279,9 @@ void pstore_get_records(int quiet) if (psi->open && psi->open(psi)) goto out; - while ((size = psi->read(&id, &type, &time, &buf, psi)) > 0) { - rc = pstore_mkfile(type, psi->name, id, buf, (size_t)size, - time, psi); + while ((size = psi->read(&id, &type, &count, &time, &buf, psi)) > 0) { + rc = pstore_mkfile(type, psi->name, id, count, buf, + (size_t)size, time, psi); kfree(buf); buf = NULL; if (rc && (rc != -EEXIST || !quiet)) diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 1a4f6da..2bfa36e 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -132,9 +132,8 @@ ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max, } static ssize_t ramoops_pstore_read(u64 *id, enum pstore_type_id *type, - struct timespec *time, - char **buf, - struct pstore_info *psi) + int *count, struct timespec *time, + char **buf, struct pstore_info *psi) { ssize_t size; struct ramoops_context *cxt = psi->data; @@ -236,8 +235,8 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, return 0; } -static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, - struct pstore_info *psi) +static int ramoops_pstore_erase(enum pstore_type_id type, u64 id, int count, + struct timespec time, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; struct persistent_ram_zone *prz; diff --git a/include/linux/efi.h b/include/linux/efi.h index 8670eb1..c47ec36 100644 --- a/include/linux/efi.h +++ b/include/linux/efi.h @@ -643,6 +643,7 @@ struct efivar_operations { efi_get_variable_t *get_variable; efi_get_next_variable_t *get_next_variable; efi_set_variable_t *set_variable; + efi_query_variable_info_t *query_variable_info; }; struct efivars { diff --git a/include/linux/pstore.h b/include/linux/pstore.h index ee3034a..1788909 100644 --- a/include/linux/pstore.h +++ b/include/linux/pstore.h @@ -50,16 +50,18 @@ struct pstore_info { int (*open)(struct pstore_info *psi); int (*close)(struct pstore_info *psi); ssize_t (*read)(u64 *id, enum pstore_type_id *type, - struct timespec *time, char **buf, + int *count, struct timespec *time, char **buf, struct pstore_info *psi); int (*write)(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, - unsigned int part, size_t size, struct pstore_info *psi); + unsigned int part, int count, size_t size, + struct pstore_info *psi); int (*write_buf)(enum pstore_type_id type, enum kmsg_dump_reason reason, u64 *id, unsigned int part, const char *buf, size_t size, struct pstore_info *psi); int (*erase)(enum pstore_type_id type, u64 id, + int count, struct timespec time, struct pstore_info *psi); void *data; }; |