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| author | Josef Bacik <josef@redhat.com> | 2011-07-16 20:44:56 -0400 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2015-05-02 14:36:14 +0200 |
| commit | a31e2968613b85e85408eb787c188af243939498 (patch) | |
| tree | b87b708e1a3545fbe0808b54556510c8df34940d /fs/coda | |
| parent | 61456a5b563ef03f189928f5919e511c8218e42d (diff) | |
| download | kernel_samsung_tuna-a31e2968613b85e85408eb787c188af243939498.zip kernel_samsung_tuna-a31e2968613b85e85408eb787c188af243939498.tar.gz kernel_samsung_tuna-a31e2968613b85e85408eb787c188af243939498.tar.bz2 | |
fs: push i_mutex and filemap_write_and_wait down into ->fsync() handlers
Btrfs needs to be able to control how filemap_write_and_wait_range() is called
in fsync to make it less of a painful operation, so push down taking i_mutex and
the calling of filemap_write_and_wait() down into the ->fsync() handlers. Some
file systems can drop taking the i_mutex altogether it seems, like ext3 and
ocfs2. For correctness sake I just pushed everything down in all cases to make
sure that we keep the current behavior the same for everybody, and then each
individual fs maintainer can make up their mind about what to do from there.
Thanks,
Acked-by: Jan Kara <jack@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Conflicts:
Documentation/filesystems/porting
Change-Id: I7697244cce355e6d443a39c5133a5c94f02e199b
Diffstat (limited to 'fs/coda')
| -rw-r--r-- | fs/coda/coda_int.h | 2 | ||||
| -rw-r--r-- | fs/coda/file.c | 8 |
2 files changed, 8 insertions, 2 deletions
diff --git a/fs/coda/coda_int.h b/fs/coda/coda_int.h index 6b443ff..b7143cf 100644 --- a/fs/coda/coda_int.h +++ b/fs/coda/coda_int.h @@ -11,7 +11,7 @@ extern int coda_fake_statfs; void coda_destroy_inodecache(void); int coda_init_inodecache(void); -int coda_fsync(struct file *coda_file, int datasync); +int coda_fsync(struct file *coda_file, loff_t start, loff_t end, int datasync); void coda_sysctl_init(void); void coda_sysctl_clean(void); diff --git a/fs/coda/file.c b/fs/coda/file.c index 0433057..8edd404 100644 --- a/fs/coda/file.c +++ b/fs/coda/file.c @@ -199,7 +199,7 @@ int coda_release(struct inode *coda_inode, struct file *coda_file) return 0; } -int coda_fsync(struct file *coda_file, int datasync) +int coda_fsync(struct file *coda_file, loff_t start, loff_t end, int datasync) { struct file *host_file; struct inode *coda_inode = coda_file->f_path.dentry->d_inode; @@ -210,6 +210,11 @@ int coda_fsync(struct file *coda_file, int datasync) S_ISLNK(coda_inode->i_mode))) return -EINVAL; + err = filemap_write_and_wait_range(coda_inode->i_mapping, start, end); + if (err) + return err; + mutex_lock(&coda_inode->i_mutex); + cfi = CODA_FTOC(coda_file); BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); host_file = cfi->cfi_container; @@ -217,6 +222,7 @@ int coda_fsync(struct file *coda_file, int datasync) err = vfs_fsync(host_file, datasync); if (!err && !datasync) err = venus_fsync(coda_inode->i_sb, coda_i2f(coda_inode)); + mutex_unlock(&coda_inode->i_mutex); return err; } |