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Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd

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* 'for-linus' of git://git.open-osd.org/linux-open-osd:
  exofs: deprecate the commands pending counter
  exofs: Write sbi->s_nextid as part of the Create command
  exofs: Add option to mount by osdname
  exofs: Override read-ahead to align on stripe_size
  exofs: simple fsync race fix
  exofs: Optimize read_4_write
  exofs: Trivial: fix some indentation and debug prints
  exofs: Remove redundant unlikely()
This commit is contained in:
Linus Torvalds 2011-03-24 07:57:38 -07:00
commit 1b506cfb6a
7 changed files with 260 additions and 66 deletions
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10
Documentation/filesystems/exofs.txt
View File

@ -104,7 +104,15 @@ Where:
exofs specific options: Options are separated by commas (,)
pid=<integer> - The partition number to mount/create as
container of the filesystem.
This option is mandatory.
This option is mandatory. integer can be
Hex by pre-pending an 0x to the number.
osdname=<id> - Mount by a device's osdname.
osdname is usually a 36 character uuid of the
form "d2683732-c906-4ee1-9dbd-c10c27bb40df".
It is one of the device's uuid specified in the
mkfs.exofs format command.
If this option is specified then the /dev/osdX
above can be empty and is ignored.
to=<integer> - Timeout in ticks for a single command.
default is (60 * HZ) [for debugging only]

18
fs/exofs/common.h
View File

@ -53,10 +53,14 @@
#define EXOFS_ROOT_ID 0x10002 /* object ID for root directory */
/* exofs Application specific page/attribute */
/* Inode attrs */
# define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3)
# define EXOFS_ATTR_INODE_DATA 1
# define EXOFS_ATTR_INODE_FILE_LAYOUT 2
# define EXOFS_ATTR_INODE_DIR_LAYOUT 3
/* Partition attrs */
# define EXOFS_APAGE_SB_DATA (0xF0000000U + 3)
# define EXOFS_ATTR_SB_STATS 1
/*
* The maximum number of files we can have is limited by the size of the
@ -86,8 +90,8 @@ enum {
*/
enum {EXOFS_FSCB_VER = 1, EXOFS_DT_VER = 1};
struct exofs_fscb {
__le64 s_nextid; /* Highest object ID used */
__le64 s_numfiles; /* Number of files on fs */
__le64 s_nextid; /* Only used after mkfs */
__le64 s_numfiles; /* Only used after mkfs */
__le32 s_version; /* == EXOFS_FSCB_VER */
__le16 s_magic; /* Magic signature */
__le16 s_newfs; /* Non-zero if this is a new fs */
@ -97,6 +101,16 @@ struct exofs_fscb {
__le64 s_dev_table_count; /* == 0 means no dev_table */
} __packed;
/*
* This struct is set on the FS partition's attributes.
* [EXOFS_APAGE_SB_DATA, EXOFS_ATTR_SB_STATS] and is written together
* with the create command, to atomically persist the sb writeable information.
*/
struct exofs_sb_stats {
__le64 s_nextid; /* Highest object ID used */
__le64 s_numfiles; /* Number of files on fs */
} __packed;
/*
* Describes the raid used in the FS. It is part of the device table.
* This here is taken from the pNFS-objects definition. In exofs we

33
fs/exofs/dir.c
View File

@ -124,7 +124,7 @@ out:
Ebadsize:
EXOFS_ERR("ERROR [exofs_check_page]: "
"size of directory #%lu is not a multiple of chunk size",
"size of directory(0x%lx) is not a multiple of chunk size\n",
dir->i_ino
);
goto fail;
@ -142,8 +142,8 @@ Espan:
goto bad_entry;
bad_entry:
EXOFS_ERR(
"ERROR [exofs_check_page]: bad entry in directory #%lu: %s - "
"offset=%lu, inode=%llu, rec_len=%d, name_len=%d",
"ERROR [exofs_check_page]: bad entry in directory(0x%lx): %s - "
"offset=%lu, inode=0x%llu, rec_len=%d, name_len=%d\n",
dir->i_ino, error, (page->index<<PAGE_CACHE_SHIFT)+offs,
_LLU(le64_to_cpu(p->inode_no)),
rec_len, p->name_len);
@ -151,8 +151,8 @@ bad_entry:
Eend:
p = (struct exofs_dir_entry *)(kaddr + offs);
EXOFS_ERR("ERROR [exofs_check_page]: "
"entry in directory #%lu spans the page boundary"
"offset=%lu, inode=%llu",
"entry in directory(0x%lx) spans the page boundary"
"offset=%lu, inode=0x%llx\n",
dir->i_ino, (page->index<<PAGE_CACHE_SHIFT)+offs,
_LLU(le64_to_cpu(p->inode_no)));
fail:
@ -261,9 +261,8 @@ exofs_readdir(struct file *filp, void *dirent, filldir_t filldir)
struct page *page = exofs_get_page(inode, n);
if (IS_ERR(page)) {
EXOFS_ERR("ERROR: "
"bad page in #%lu",
inode->i_ino);
EXOFS_ERR("ERROR: bad page in directory(0x%lx)\n",
inode->i_ino);
filp->f_pos += PAGE_CACHE_SIZE - offset;
return PTR_ERR(page);
}
@ -283,7 +282,8 @@ exofs_readdir(struct file *filp, void *dirent, filldir_t filldir)
for (; (char *)de <= limit; de = exofs_next_entry(de)) {
if (de->rec_len == 0) {
EXOFS_ERR("ERROR: "
"zero-length directory entry");
"zero-length entry in directory(0x%lx)\n",
inode->i_ino);
exofs_put_page(page);
return -EIO;
}
@ -342,9 +342,9 @@ struct exofs_dir_entry *exofs_find_entry(struct inode *dir,
kaddr += exofs_last_byte(dir, n) - reclen;
while ((char *) de <= kaddr) {
if (de->rec_len == 0) {
EXOFS_ERR(
"ERROR: exofs_find_entry: "
"zero-length directory entry");
EXOFS_ERR("ERROR: zero-length entry in "
"directory(0x%lx)\n",
dir->i_ino);
exofs_put_page(page);
goto out;
}
@ -472,7 +472,8 @@ int exofs_add_link(struct dentry *dentry, struct inode *inode)
}
if (de->rec_len == 0) {
EXOFS_ERR("ERROR: exofs_add_link: "
"zero-length directory entry");
"zero-length entry in directory(0x%lx)\n",
inode->i_ino);
err = -EIO;
goto out_unlock;
}
@ -491,7 +492,8 @@ int exofs_add_link(struct dentry *dentry, struct inode *inode)
exofs_put_page(page);
}
EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=%p", dentry, inode);
EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=0x%lx\n",
dentry, inode->i_ino);
return -EINVAL;
got_it:
@ -542,7 +544,8 @@ int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)
while (de < dir) {
if (de->rec_len == 0) {
EXOFS_ERR("ERROR: exofs_delete_entry:"
"zero-length directory entry");
"zero-length entry in directory(0x%lx)\n",
inode->i_ino);
err = -EIO;
goto out;
}

6
fs/exofs/exofs.h
View File

@ -77,7 +77,7 @@ struct exofs_layout {
* our extension to the in-memory superblock
*/
struct exofs_sb_info {
struct exofs_fscb s_fscb; /* Written often, pre-allocate*/
struct exofs_sb_stats s_ess; /* Written often, pre-allocate*/
int s_timeout; /* timeout for OSD operations */
uint64_t s_nextid; /* highest object ID used */
uint32_t s_numfiles; /* number of files on fs */
@ -256,6 +256,8 @@ static inline int exofs_oi_read(struct exofs_i_info *oi,
}
/* inode.c */
unsigned exofs_max_io_pages(struct exofs_layout *layout,
unsigned expected_pages);
int exofs_setattr(struct dentry *, struct iattr *);
int exofs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
@ -279,7 +281,7 @@ int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
struct inode *);
/* super.c */
int exofs_sync_fs(struct super_block *sb, int wait);
int exofs_sbi_write_stats(struct exofs_sb_info *sbi);
/*********************
* operation vectors *

16
fs/exofs/file.c
View File

@ -45,22 +45,8 @@ static int exofs_release_file(struct inode *inode, struct file *filp)
static int exofs_file_fsync(struct file *filp, int datasync)
{
int ret;
struct inode *inode = filp->f_mapping->host;
struct super_block *sb;
if (!(inode->i_state & I_DIRTY))
return 0;
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
return 0;
ret = sync_inode_metadata(inode, 1);
/* This is a good place to write the sb */
/* TODO: Sechedule an sb-sync on create */
sb = inode->i_sb;
if (sb->s_dirt)
exofs_sync_fs(sb, 1);
ret = sync_inode_metadata(filp->f_mapping->host, 1);
return ret;
}

51
fs/exofs/inode.c
View File

@ -43,6 +43,17 @@ enum { BIO_MAX_PAGES_KMALLOC =
PAGE_SIZE / sizeof(struct page *),
};
unsigned exofs_max_io_pages(struct exofs_layout *layout,
unsigned expected_pages)
{
unsigned pages = min_t(unsigned, expected_pages, MAX_PAGES_KMALLOC);
/* TODO: easily support bio chaining */
pages = min_t(unsigned, pages,
layout->group_width * BIO_MAX_PAGES_KMALLOC);
return pages;
}
struct page_collect {
struct exofs_sb_info *sbi;
struct inode *inode;
@ -97,8 +108,7 @@ static void _pcol_reset(struct page_collect *pcol)
static int pcol_try_alloc(struct page_collect *pcol)
{
unsigned pages = min_t(unsigned, pcol->expected_pages,
MAX_PAGES_KMALLOC);
unsigned pages;
if (!pcol->ios) { /* First time allocate io_state */
int ret = exofs_get_io_state(&pcol->sbi->layout, &pcol->ios);
@ -108,8 +118,7 @@ static int pcol_try_alloc(struct page_collect *pcol)
}
/* TODO: easily support bio chaining */
pages = min_t(unsigned, pages,
pcol->sbi->layout.group_width * BIO_MAX_PAGES_KMALLOC);
pages = exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages);
for (; pages; pages >>= 1) {
pcol->pages = kmalloc(pages * sizeof(struct page *),
@ -350,8 +359,10 @@ static int readpage_strip(void *data, struct page *page)
if (!pcol->read_4_write)
unlock_page(page);
EXOFS_DBGMSG("readpage_strip(0x%lx, 0x%lx) empty page,"
" splitting\n", inode->i_ino, page->index);
EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx "
"read_4_write=%d index=0x%lx end_index=0x%lx "
"splitting\n", inode->i_ino, len,
pcol->read_4_write, page->index, end_index);
return read_exec(pcol);
}
@ -722,11 +733,28 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
/* read modify write */
if (!PageUptodate(page) && (len != PAGE_CACHE_SIZE)) {
loff_t i_size = i_size_read(mapping->host);
pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
size_t rlen;
if (page->index < end_index)
rlen = PAGE_CACHE_SIZE;
else if (page->index == end_index)
rlen = i_size & ~PAGE_CACHE_MASK;
else
rlen = 0;
if (!rlen) {
clear_highpage(page);
SetPageUptodate(page);
goto out;
}
ret = _readpage(page, true);
if (ret) {
/*SetPageError was done by _readpage. Is it ok?*/
unlock_page(page);
EXOFS_DBGMSG("__readpage_filler failed\n");
EXOFS_DBGMSG("__readpage failed\n");
}
}
out:
@ -1030,6 +1058,7 @@ struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
}
inode->i_mapping->backing_dev_info = sb->s_bdi;
if (S_ISREG(inode->i_mode)) {
inode->i_op = &exofs_file_inode_operations;
inode->i_fop = &exofs_file_operations;
@ -1073,6 +1102,7 @@ int __exofs_wait_obj_created(struct exofs_i_info *oi)
}
return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0;
}
/*
* Callback function from exofs_new_inode(). The important thing is that we
* set the obj_created flag so that other methods know that the object exists on
@ -1130,7 +1160,7 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
sbi = sb->s_fs_info;
sb->s_dirt = 1;
inode->i_mapping->backing_dev_info = sb->s_bdi;
inode_init_owner(inode, dir, mode);
inode->i_ino = sbi->s_nextid++;
inode->i_blkbits = EXOFS_BLKSHIFT;
@ -1141,6 +1171,8 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
spin_unlock(&sbi->s_next_gen_lock);
insert_inode_hash(inode);
exofs_sbi_write_stats(sbi); /* Make sure new sbi->s_nextid is on disk */
mark_inode_dirty(inode);
ret = exofs_get_io_state(&sbi->layout, &ios);
@ -1271,7 +1303,8 @@ out:
int exofs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
return exofs_update_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
/* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */
return exofs_update_inode(inode, 1);
}
/*

192
fs/exofs/super.c
View File

@ -48,6 +48,7 @@
* struct to hold what we get from mount options
*/
struct exofs_mountopt {
bool is_osdname;
const char *dev_name;
uint64_t pid;
int timeout;
@ -56,7 +57,7 @@ struct exofs_mountopt {
/*
* exofs-specific mount-time options.
*/
enum { Opt_pid, Opt_to, Opt_mkfs, Opt_format, Opt_err };
enum { Opt_name, Opt_pid, Opt_to, Opt_err };
/*
* Our mount-time options. These should ideally be 64-bit unsigned, but the
@ -64,6 +65,7 @@ enum { Opt_pid, Opt_to, Opt_mkfs, Opt_format, Opt_err };
* sufficient for most applications now.
*/
static match_table_t tokens = {
{Opt_name, "osdname=%s"},
{Opt_pid, "pid=%u"},
{Opt_to, "to=%u"},
{Opt_err, NULL}
@ -94,6 +96,14 @@ static int parse_options(char *options, struct exofs_mountopt *opts)
token = match_token(p, tokens, args);
switch (token) {
case Opt_name:
opts->dev_name = match_strdup(&args[0]);
if (unlikely(!opts->dev_name)) {
EXOFS_ERR("Error allocating dev_name");
return -ENOMEM;
}
opts->is_osdname = true;
break;
case Opt_pid:
if (0 == match_strlcpy(str, &args[0], sizeof(str)))
return -EINVAL;
@ -203,6 +213,101 @@ static void destroy_inodecache(void)
static const struct super_operations exofs_sops;
static const struct export_operations exofs_export_ops;
static const struct osd_attr g_attr_sb_stats = ATTR_DEF(
EXOFS_APAGE_SB_DATA,
EXOFS_ATTR_SB_STATS,
sizeof(struct exofs_sb_stats));
static int __sbi_read_stats(struct exofs_sb_info *sbi)
{
struct osd_attr attrs[] = {
[0] = g_attr_sb_stats,
};
struct exofs_io_state *ios;
int ret;
ret = exofs_get_io_state(&sbi->layout, &ios);
if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
return ret;
}
ios->cred = sbi->s_cred;
ios->in_attr = attrs;
ios->in_attr_len = ARRAY_SIZE(attrs);
ret = exofs_sbi_read(ios);
if (unlikely(ret)) {
EXOFS_ERR("Error reading super_block stats => %d\n", ret);
goto out;
}
ret = extract_attr_from_ios(ios, &attrs[0]);
if (ret) {
EXOFS_ERR("%s: extract_attr of sb_stats failed\n", __func__);
goto out;
}
if (attrs[0].len) {
struct exofs_sb_stats *ess;
if (unlikely(attrs[0].len != sizeof(*ess))) {
EXOFS_ERR("%s: Wrong version of exofs_sb_stats "
"size(%d) != expected(%zd)\n",
__func__, attrs[0].len, sizeof(*ess));
goto out;
}
ess = attrs[0].val_ptr;
sbi->s_nextid = le64_to_cpu(ess->s_nextid);
sbi->s_numfiles = le32_to_cpu(ess->s_numfiles);
}
out:
exofs_put_io_state(ios);
return ret;
}
static void stats_done(struct exofs_io_state *ios, void *p)
{
exofs_put_io_state(ios);
/* Good thanks nothing to do anymore */
}
/* Asynchronously write the stats attribute */
int exofs_sbi_write_stats(struct exofs_sb_info *sbi)
{
struct osd_attr attrs[] = {
[0] = g_attr_sb_stats,
};
struct exofs_io_state *ios;
int ret;
ret = exofs_get_io_state(&sbi->layout, &ios);
if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_get_io_state failed.\n", __func__);
return ret;
}
sbi->s_ess.s_nextid = cpu_to_le64(sbi->s_nextid);
sbi->s_ess.s_numfiles = cpu_to_le64(sbi->s_numfiles);
attrs[0].val_ptr = &sbi->s_ess;
ios->cred = sbi->s_cred;
ios->done = stats_done;
ios->private = sbi;
ios->out_attr = attrs;
ios->out_attr_len = ARRAY_SIZE(attrs);
ret = exofs_sbi_write(ios);
if (unlikely(ret)) {
EXOFS_ERR("%s: exofs_sbi_write failed.\n", __func__);
exofs_put_io_state(ios);
}
return ret;
}
/*
* Write the superblock to the OSD
*/
@ -213,18 +318,25 @@ int exofs_sync_fs(struct super_block *sb, int wait)
struct exofs_io_state *ios;
int ret = -ENOMEM;
lock_super(sb);
sbi = sb->s_fs_info;
fscb = &sbi->s_fscb;
fscb = kmalloc(sizeof(*fscb), GFP_KERNEL);
if (unlikely(!fscb))
return -ENOMEM;
sbi = sb->s_fs_info;
/* NOTE: We no longer dirty the super_block anywhere in exofs. The
* reason we write the fscb here on unmount is so we can stay backwards
* compatible with fscb->s_version == 1. (What we are not compatible
* with is if a new version FS crashed and then we try to mount an old
* version). Otherwise the exofs_fscb is read-only from mkfs time. All
* the writeable info is set in exofs_sbi_write_stats() above.
*/
ret = exofs_get_io_state(&sbi->layout, &ios);
if (ret)
if (unlikely(ret))
goto out;
/* Note: We only write the changing part of the fscb. .i.e upto the
* the fscb->s_dev_table_oid member. There is no read-modify-write
* here.
*/
lock_super(sb);
ios->length = offsetof(struct exofs_fscb, s_dev_table_oid);
memset(fscb, 0, ios->length);
fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
@ -239,16 +351,17 @@ int exofs_sync_fs(struct super_block *sb, int wait)
ios->cred = sbi->s_cred;
ret = exofs_sbi_write(ios);
if (unlikely(ret)) {
if (unlikely(ret))
EXOFS_ERR("%s: exofs_sbi_write failed.\n", __func__);
goto out;
}
sb->s_dirt = 0;
else
sb->s_dirt = 0;
unlock_super(sb);
out:
EXOFS_DBGMSG("s_nextid=0x%llx ret=%d\n", _LLU(sbi->s_nextid), ret);
exofs_put_io_state(ios);
unlock_super(sb);
kfree(fscb);
return ret;
}
@ -292,13 +405,14 @@ static void exofs_put_super(struct super_block *sb)
int num_pend;
struct exofs_sb_info *sbi = sb->s_fs_info;
if (sb->s_dirt)
exofs_write_super(sb);
/* make sure there are no pending commands */
for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
num_pend = atomic_read(&sbi->s_curr_pending)) {
wait_queue_head_t wq;
printk(KERN_NOTICE "%s: !!Pending operations in flight. "
"This is a BUG. please report to osd-dev@open-osd.org\n",
__func__);
init_waitqueue_head(&wq);
wait_event_timeout(wq,
(atomic_read(&sbi->s_curr_pending) == 0),
@ -390,6 +504,23 @@ static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
return 0;
}
static unsigned __ra_pages(struct exofs_layout *layout)
{
const unsigned _MIN_RA = 32; /* min 128K read-ahead */
unsigned ra_pages = layout->group_width * layout->stripe_unit /
PAGE_SIZE;
unsigned max_io_pages = exofs_max_io_pages(layout, ~0);
ra_pages *= 2; /* two stripes */
if (ra_pages < _MIN_RA)
ra_pages = roundup(_MIN_RA, ra_pages / 2);
if (ra_pages > max_io_pages)
ra_pages = max_io_pages;
return ra_pages;
}
/* @odi is valid only as long as @fscb_dev is valid */
static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev,
struct osd_dev_info *odi)
@ -495,7 +626,7 @@ static int exofs_read_lookup_dev_table(struct exofs_sb_info **psbi,
}
od = osduld_info_lookup(&odi);
if (unlikely(IS_ERR(od))) {
if (IS_ERR(od)) {
ret = PTR_ERR(od);
EXOFS_ERR("ERROR: device requested is not found "
"osd_name-%s =>%d\n", odi.osdname, ret);
@ -558,9 +689,17 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
goto free_bdi;
/* use mount options to fill superblock */
od = osduld_path_lookup(opts->dev_name);
if (opts->is_osdname) {
struct osd_dev_info odi = {.systemid_len = 0};
odi.osdname_len = strlen(opts->dev_name);
odi.osdname = (u8 *)opts->dev_name;
od = osduld_info_lookup(&odi);
} else {
od = osduld_path_lookup(opts->dev_name);
}
if (IS_ERR(od)) {
ret = PTR_ERR(od);
ret = -EINVAL;
goto free_sbi;
}
@ -594,6 +733,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
goto free_sbi;
sb->s_magic = le16_to_cpu(fscb.s_magic);
/* NOTE: we read below to be backward compatible with old versions */
sbi->s_nextid = le64_to_cpu(fscb.s_nextid);
sbi->s_numfiles = le32_to_cpu(fscb.s_numfiles);
@ -604,7 +744,7 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
ret = -EINVAL;
goto free_sbi;
}
if (le32_to_cpu(fscb.s_version) != EXOFS_FSCB_VER) {
if (le32_to_cpu(fscb.s_version) > EXOFS_FSCB_VER) {
EXOFS_ERR("ERROR: Bad FSCB version expected-%d got-%d\n",
EXOFS_FSCB_VER, le32_to_cpu(fscb.s_version));
ret = -EINVAL;
@ -622,7 +762,10 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
goto free_sbi;
}
__sbi_read_stats(sbi);
/* set up operation vectors */
sbi->bdi.ra_pages = __ra_pages(&sbi->layout);
sb->s_bdi = &sbi->bdi;
sb->s_fs_info = sbi;
sb->s_op = &exofs_sops;
@ -652,6 +795,8 @@ static int exofs_fill_super(struct super_block *sb, void *data, int silent)
_exofs_print_device("Mounting", opts->dev_name, sbi->layout.s_ods[0],
sbi->layout.s_pid);
if (opts->is_osdname)
kfree(opts->dev_name);
return 0;
free_sbi:
@ -660,6 +805,8 @@ free_bdi:
EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n",
opts->dev_name, sbi->layout.s_pid, ret);
exofs_free_sbi(sbi);
if (opts->is_osdname)
kfree(opts->dev_name);
return ret;
}
@ -677,7 +824,8 @@ static struct dentry *exofs_mount(struct file_system_type *type,
if (ret)
return ERR_PTR(ret);
opts.dev_name = dev_name;
if (!opts.dev_name)
opts.dev_name = dev_name;
return mount_nodev(type, flags, &opts, exofs_fill_super);
}