summaryrefslogtreecommitdiff
path: root/fs/xfs/xfs_vnodeops.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/xfs/xfs_vnodeops.c')
-rw-r--r--fs/xfs/xfs_vnodeops.c168
1 files changed, 121 insertions, 47 deletions
diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c
index 2a5c637344b4..d95f565a390e 100644
--- a/fs/xfs/xfs_vnodeops.c
+++ b/fs/xfs/xfs_vnodeops.c
@@ -47,6 +47,7 @@
#include "xfs_filestream.h"
#include "xfs_vnodeops.h"
#include "xfs_trace.h"
+#include "xfs_icache.h"
/*
* The maximum pathlen is 1024 bytes. Since the minimum file system
@@ -79,7 +80,7 @@ xfs_readlink_bmap(
d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
- bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0);
+ bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0, NULL);
if (!bp)
return XFS_ERROR(ENOMEM);
error = bp->b_error;
@@ -150,7 +151,7 @@ xfs_readlink(
* when the link count isn't zero and by xfs_dm_punch_hole() when
* punching a hole to EOF.
*/
-STATIC int
+int
xfs_free_eofblocks(
xfs_mount_t *mp,
xfs_inode_t *ip,
@@ -199,7 +200,7 @@ xfs_free_eofblocks(
if (need_iolock) {
if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
xfs_trans_cancel(tp, 0);
- return 0;
+ return EAGAIN;
}
}
@@ -237,6 +238,8 @@ xfs_free_eofblocks(
} else {
error = xfs_trans_commit(tp,
XFS_TRANS_RELEASE_LOG_RES);
+ if (!error)
+ xfs_inode_clear_eofblocks_tag(ip);
}
xfs_iunlock(ip, XFS_ILOCK_EXCL);
@@ -425,19 +428,18 @@ xfs_release(
truncated = xfs_iflags_test_and_clear(ip, XFS_ITRUNCATED);
if (truncated) {
xfs_iflags_clear(ip, XFS_IDIRTY_RELEASE);
- if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0)
- xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE);
+ if (VN_DIRTY(VFS_I(ip)) && ip->i_delayed_blks > 0) {
+ error = -filemap_flush(VFS_I(ip)->i_mapping);
+ if (error)
+ return error;
+ }
}
}
if (ip->i_d.di_nlink == 0)
return 0;
- if ((S_ISREG(ip->i_d.di_mode) &&
- (VFS_I(ip)->i_size > 0 ||
- (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) &&
- (ip->i_df.if_flags & XFS_IFEXTENTS)) &&
- (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) {
+ if (xfs_can_free_eofblocks(ip, false)) {
/*
* If we can't get the iolock just skip truncating the blocks
@@ -464,7 +466,7 @@ xfs_release(
return 0;
error = xfs_free_eofblocks(mp, ip, true);
- if (error)
+ if (error && error != EAGAIN)
return error;
/* delalloc blocks after truncation means it really is dirty */
@@ -513,13 +515,12 @@ xfs_inactive(
goto out;
if (ip->i_d.di_nlink != 0) {
- if ((S_ISREG(ip->i_d.di_mode) &&
- (VFS_I(ip)->i_size > 0 ||
- (VN_CACHED(VFS_I(ip)) > 0 || ip->i_delayed_blks > 0)) &&
- (ip->i_df.if_flags & XFS_IFEXTENTS) &&
- (!(ip->i_d.di_flags &
- (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)) ||
- ip->i_delayed_blks != 0))) {
+ /*
+ * force is true because we are evicting an inode from the
+ * cache. Post-eof blocks must be freed, lest we end up with
+ * broken free space accounting.
+ */
+ if (xfs_can_free_eofblocks(ip, true)) {
error = xfs_free_eofblocks(mp, ip, false);
if (error)
return VN_INACTIVE_CACHE;
@@ -777,7 +778,7 @@ xfs_create(
XFS_TRANS_PERM_LOG_RES, log_count);
if (error == ENOSPC) {
/* flush outstanding delalloc blocks and retry */
- xfs_flush_inodes(dp);
+ xfs_flush_inodes(mp);
error = xfs_trans_reserve(tp, resblks, log_res, 0,
XFS_TRANS_PERM_LOG_RES, log_count);
}
@@ -1957,12 +1958,11 @@ xfs_free_file_space(
rounding = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
ioffset = offset & ~(rounding - 1);
-
- if (VN_CACHED(VFS_I(ip)) != 0) {
- error = xfs_flushinval_pages(ip, ioffset, -1, FI_REMAPF_LOCKED);
- if (error)
- goto out_unlock_iolock;
- }
+ error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
+ ioffset, -1);
+ if (error)
+ goto out_unlock_iolock;
+ truncate_pagecache_range(VFS_I(ip), ioffset, -1);
/*
* Need to zero the stuff we're not freeing, on disk.
@@ -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 llen;
xfs_trans_t *tp;
struct iattr iattr;
- int prealloc_type;
if (!S_ISREG(ip->i_d.di_mode))
return XFS_ERROR(EINVAL);
@@ -2141,12 +2206,30 @@ xfs_change_file_space(
return XFS_ERROR(EINVAL);
}
- llen = bf->l_len > 0 ? bf->l_len - 1 : bf->l_len;
+ /*
+ * length of <= 0 for resv/unresv/zero is invalid. length for
+ * alloc/free is ignored completely and we have no idea what userspace
+ * might have set it to, so set it to zero to allow range
+ * checks to pass.
+ */
+ switch (cmd) {
+ case XFS_IOC_ZERO_RANGE:
+ case XFS_IOC_RESVSP:
+ case XFS_IOC_RESVSP64:
+ case XFS_IOC_UNRESVSP:
+ case XFS_IOC_UNRESVSP64:
+ if (bf->l_len <= 0)
+ return XFS_ERROR(EINVAL);
+ break;
+ default:
+ bf->l_len = 0;
+ break;
+ }
if (bf->l_start < 0 ||
bf->l_start > mp->m_super->s_maxbytes ||
- bf->l_start + llen < 0 ||
- bf->l_start + llen > mp->m_super->s_maxbytes)
+ bf->l_start + bf->l_len < 0 ||
+ bf->l_start + bf->l_len >= mp->m_super->s_maxbytes)
return XFS_ERROR(EINVAL);
bf->l_whence = 0;
@@ -2154,29 +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;
- xfs_tosspages(ip, startoffset, startoffset + bf->l_len, 0);
- /* 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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-30 11:31:48 +0300