diff options
| -rw-r--r-- | fs/xfs/xfs_file.c | 2 | ||||
| -rw-r--r-- | fs/xfs/xfs_vnodeops.c | 96 | ||||
| -rw-r--r-- | fs/xfs/xfs_vnodeops.h | 1 |
3 files changed, 77 insertions, 22 deletions
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 400b187595bb..67284edb84d7 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -86,7 +86,7 @@ xfs_rw_ilock_demote( * valid before the operation, it will be read from disk before * being partially zeroed. */ -STATIC int +int xfs_iozero( struct xfs_inode *ip, /* inode */ loff_t pos, /* offset in file */ diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 26880793feca..d95f565a390e 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -2095,6 +2095,73 @@ xfs_free_file_space( return error; } + +STATIC int +xfs_zero_file_space( + struct xfs_inode *ip, + xfs_off_t offset, + xfs_off_t len, + int attr_flags) +{ + struct xfs_mount *mp = ip->i_mount; + uint granularity; + xfs_off_t start_boundary; + xfs_off_t end_boundary; + int error; + + granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE); + + /* + * Round the range of extents we are going to convert inwards. If the + * offset is aligned, then it doesn't get changed so we zero from the + * start of the block offset points to. + */ + start_boundary = round_up(offset, granularity); + end_boundary = round_down(offset + len, granularity); + + ASSERT(start_boundary >= offset); + ASSERT(end_boundary <= offset + len); + + if (!(attr_flags & XFS_ATTR_NOLOCK)) + xfs_ilock(ip, XFS_IOLOCK_EXCL); + + if (start_boundary < end_boundary - 1) { + /* punch out the page cache over the conversion range */ + truncate_pagecache_range(VFS_I(ip), start_boundary, + end_boundary - 1); + /* convert the blocks */ + error = xfs_alloc_file_space(ip, start_boundary, + end_boundary - start_boundary - 1, + XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT, + attr_flags); + if (error) + goto out_unlock; + + /* We've handled the interior of the range, now for the edges */ + if (start_boundary != offset) + error = xfs_iozero(ip, offset, start_boundary - offset); + if (error) + goto out_unlock; + + if (end_boundary != offset + len) + error = xfs_iozero(ip, end_boundary, + offset + len - end_boundary); + + } else { + /* + * It's either a sub-granularity range or the range spanned lies + * partially across two adjacent blocks. + */ + error = xfs_iozero(ip, offset, len); + } + +out_unlock: + if (!(attr_flags & XFS_ATTR_NOLOCK)) + xfs_iunlock(ip, XFS_IOLOCK_EXCL); + return error; + +} + /* * xfs_change_file_space() * This routine allocates or frees disk space for the given file. @@ -2120,10 +2187,8 @@ xfs_change_file_space( xfs_fsize_t fsize; int setprealloc; xfs_off_t startoffset; - xfs_off_t end; xfs_trans_t *tp; struct iattr iattr; - int prealloc_type; if (!S_ISREG(ip->i_d.di_mode)) return XFS_ERROR(EINVAL); @@ -2172,31 +2237,20 @@ xfs_change_file_space( startoffset = bf->l_start; fsize = XFS_ISIZE(ip); - /* - * XFS_IOC_RESVSP and XFS_IOC_UNRESVSP will reserve or unreserve - * file space. - * These calls do NOT zero the data space allocated to the file, - * nor do they change the file size. - * - * XFS_IOC_ALLOCSP and XFS_IOC_FREESP will allocate and free file - * space. - * These calls cause the new file data to be zeroed and the file - * size to be changed. - */ setprealloc = clrprealloc = 0; - prealloc_type = XFS_BMAPI_PREALLOC; - switch (cmd) { case XFS_IOC_ZERO_RANGE: - prealloc_type |= XFS_BMAPI_CONVERT; - end = round_down(startoffset + bf->l_len, PAGE_SIZE) - 1; - if (startoffset <= end) - truncate_pagecache_range(VFS_I(ip), startoffset, end); - /* FALLTHRU */ + error = xfs_zero_file_space(ip, startoffset, bf->l_len, + attr_flags); + if (error) + return error; + setprealloc = 1; + break; + case XFS_IOC_RESVSP: case XFS_IOC_RESVSP64: error = xfs_alloc_file_space(ip, startoffset, bf->l_len, - prealloc_type, attr_flags); + XFS_BMAPI_PREALLOC, attr_flags); if (error) return error; setprealloc = 1; diff --git a/fs/xfs/xfs_vnodeops.h b/fs/xfs/xfs_vnodeops.h index 91a03fa3814f..5163022d9808 100644 --- a/fs/xfs/xfs_vnodeops.h +++ b/fs/xfs/xfs_vnodeops.h @@ -49,6 +49,7 @@ int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags); int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize, int flags, struct attrlist_cursor_kern *cursor); +int xfs_iozero(struct xfs_inode *, loff_t, size_t); int xfs_zero_eof(struct xfs_inode *, xfs_off_t, xfs_fsize_t); int xfs_free_eofblocks(struct xfs_mount *, struct xfs_inode *, bool); |
