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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-29 22:43:38 +1100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-01-29 22:43:38 +1100 |
| commit | 8cd226ca3f64f28c8123ebfaa6afe8dc8c18b174 (patch) | |
| tree | 6a668a8e899dca090ded0d3b8d6badda8f97d1b0 /fs/ext4/file.c | |
| parent | 6b11d8179d1c6e560edc02c40a53b65fde83bf3f (diff) | |
| parent | 4019191be7316ed4a39e1c1c2b623baa7dc6c843 (diff) | |
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (50 commits)
jbd2: sparse pointer use of zero as null
jbd2: Use round-jiffies() function for the "5 second" ext4/jbd2 wakeup
jbd2: Mark jbd2 slabs as SLAB_TEMPORARY
jbd2: add lockdep support
ext4: Use the ext4_ext_actual_len() helper function
ext4: fix uniniatilized extent splitting error
ext4: Check for return value from sb_set_blocksize
ext4: Add stripe= option to /proc/mounts
ext4: Enable the multiblock allocator by default
ext4: Add multi block allocator for ext4
ext4: Add new functions for searching extent tree
ext4: Add ext4_find_next_bit()
ext4: fix up EXT4FS_DEBUG builds
ext4: Fix ext4_show_options to show the correct mount options.
ext4: Add EXT4_IOC_MIGRATE ioctl
ext4: Add inode version support in ext4
vfs: Add 64 bit i_version support
ext4: Add the journal checksum feature
jbd2: jbd2 stats through procfs
ext4: Take read lock during overwrite case.
...
Diffstat (limited to 'fs/ext4/file.c')
| -rw-r--r-- | fs/ext4/file.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 1a81cd66d63..ac35ec58db5 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -37,9 +37,9 @@ static int ext4_release_file (struct inode * inode, struct file * filp) if ((filp->f_mode & FMODE_WRITE) && (atomic_read(&inode->i_writecount) == 1)) { - mutex_lock(&EXT4_I(inode)->truncate_mutex); + down_write(&EXT4_I(inode)->i_data_sem); ext4_discard_reservation(inode); - mutex_unlock(&EXT4_I(inode)->truncate_mutex); + up_write(&EXT4_I(inode)->i_data_sem); } if (is_dx(inode) && filp->private_data) ext4_htree_free_dir_info(filp->private_data); @@ -56,8 +56,25 @@ ext4_file_write(struct kiocb *iocb, const struct iovec *iov, ssize_t ret; int err; - ret = generic_file_aio_write(iocb, iov, nr_segs, pos); + /* + * If we have encountered a bitmap-format file, the size limit + * is smaller than s_maxbytes, which is for extent-mapped files. + */ + + if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL)) { + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + size_t length = iov_length(iov, nr_segs); + if (pos > sbi->s_bitmap_maxbytes) + return -EFBIG; + + if (pos + length > sbi->s_bitmap_maxbytes) { + nr_segs = iov_shorten((struct iovec *)iov, nr_segs, + sbi->s_bitmap_maxbytes - pos); + } + } + + ret = generic_file_aio_write(iocb, iov, nr_segs, pos); /* * Skip flushing if there was an error, or if nothing was written. */ |