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authorChristoph Hellwig <hch@lst.de>2020-05-23 10:30:14 +0300
committerTheodore Ts'o <tytso@mit.edu>2020-06-04 06:16:55 +0300
commit45dd052e67ad17c7a24874a783f41aeab15bc294 (patch)
tree8babffcf81e916cbe3e5a21b7bace3a040c0e11d /fs
parentcddf8a2c4a8286ae60fc866eab59c8bc524e93a0 (diff)
downloadlinux-45dd052e67ad17c7a24874a783f41aeab15bc294.tar.xz
fs: handle FIEMAP_FLAG_SYNC in fiemap_prep
By moving FIEMAP_FLAG_SYNC handling to fiemap_prep we ensure it is handled once instead of duplicated, but can still be done under fs locks, like xfs/iomap intended with its duplicate handling. Also make sure the error value of filemap_write_and_wait is propagated to user space. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Link: https://lore.kernel.org/r/20200523073016.2944131-8-hch@lst.de Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs')
-rw-r--r--fs/btrfs/inode.c4
-rw-r--r--fs/cifs/smb2ops.c3
-rw-r--r--fs/ext4/extents.c2
-rw-r--r--fs/ext4/ioctl.c3
-rw-r--r--fs/f2fs/data.c3
-rw-r--r--fs/ioctl.c10
-rw-r--r--fs/iomap/fiemap.c8
-rw-r--r--fs/nilfs2/inode.c2
-rw-r--r--fs/ocfs2/extent_map.c5
-rw-r--r--fs/overlayfs/inode.c4
10 files changed, 13 insertions, 31 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 1f1ec361089b..529ffa5e7b45 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -8243,14 +8243,12 @@ out:
return ret;
}
-#define BTRFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC)
-
static int btrfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
__u64 start, __u64 len)
{
int ret;
- ret = fiemap_prep(inode, fieinfo, start, &len, BTRFS_FIEMAP_FLAGS);
+ ret = fiemap_prep(inode, fieinfo, start, &len, 0);
if (ret)
return ret;
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 828e53e795c6..300ade2acc41 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -3408,8 +3408,7 @@ static int smb3_fiemap(struct cifs_tcon *tcon,
int i, num, rc, flags, last_blob;
u64 next;
- rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len,
- FIEMAP_FLAG_SYNC);
+ rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0);
if (rc)
return rc;
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index cea083efb650..7d088ff1e902 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4938,7 +4938,7 @@ int ext4_get_es_cache(struct inode *inode, struct fiemap_extent_info *fieinfo,
fieinfo->fi_flags &= ~FIEMAP_FLAG_CACHE;
}
- error = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_SYNC);
+ error = fiemap_prep(inode, fieinfo, start, &len, 0);
if (error)
return error;
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 0746532ba463..f81acbbb1b12 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -759,9 +759,6 @@ static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
return -EFAULT;
- if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
- filemap_write_and_wait(inode->i_mapping);
-
error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start,
fiemap.fm_length);
fiemap.fm_flags = fieinfo.fi_flags;
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 03faafc591b1..9de7dc476ed1 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1825,8 +1825,7 @@ int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return ret;
}
- ret = fiemap_prep(inode, fieinfo, start, &len,
- FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
+ ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
if (ret)
return ret;
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 56bbf02209ae..b16e962340db 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -166,6 +166,7 @@ int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
{
u64 maxbytes = inode->i_sb->s_maxbytes;
u32 incompat_flags;
+ int ret = 0;
if (*len == 0)
return -EINVAL;
@@ -178,13 +179,17 @@ int fiemap_prep(struct inode *inode, struct fiemap_extent_info *fieinfo,
if (*len > maxbytes || (maxbytes - *len) < start)
*len = maxbytes - start;
+ supported_flags |= FIEMAP_FLAG_SYNC;
supported_flags &= FIEMAP_FLAGS_COMPAT;
incompat_flags = fieinfo->fi_flags & ~supported_flags;
if (incompat_flags) {
fieinfo->fi_flags = incompat_flags;
return -EBADR;
}
- return 0;
+
+ if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
+ ret = filemap_write_and_wait(inode->i_mapping);
+ return ret;
}
EXPORT_SYMBOL(fiemap_prep);
@@ -213,9 +218,6 @@ static int ioctl_fiemap(struct file *filp, struct fiemap __user *ufiemap)
fieinfo.fi_extents_max * sizeof(struct fiemap_extent)))
return -EFAULT;
- if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC)
- filemap_write_and_wait(inode->i_mapping);
-
error = inode->i_op->fiemap(inode, &fieinfo, fiemap.fm_start,
fiemap.fm_length);
fiemap.fm_flags = fieinfo.fi_flags;
diff --git a/fs/iomap/fiemap.c b/fs/iomap/fiemap.c
index 89dca4a97e4a..aab070df4a21 100644
--- a/fs/iomap/fiemap.c
+++ b/fs/iomap/fiemap.c
@@ -75,16 +75,10 @@ int iomap_fiemap(struct inode *inode, struct fiemap_extent_info *fi,
ctx.fi = fi;
ctx.prev.type = IOMAP_HOLE;
- ret = fiemap_prep(inode, fi, start, &len, FIEMAP_FLAG_SYNC);
+ ret = fiemap_prep(inode, fi, start, &len, 0);
if (ret)
return ret;
- if (fi->fi_flags & FIEMAP_FLAG_SYNC) {
- ret = filemap_write_and_wait(inode->i_mapping);
- if (ret)
- return ret;
- }
-
while (len > 0) {
ret = iomap_apply(inode, start, len, IOMAP_REPORT, ops, &ctx,
iomap_fiemap_actor);
diff --git a/fs/nilfs2/inode.c b/fs/nilfs2/inode.c
index 052c2da11e4d..25b0d368ecdb 100644
--- a/fs/nilfs2/inode.c
+++ b/fs/nilfs2/inode.c
@@ -1006,7 +1006,7 @@ int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
unsigned int blkbits = inode->i_blkbits;
int ret, n;
- ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_SYNC);
+ ret = fiemap_prep(inode, fieinfo, start, &len, 0);
if (ret)
return ret;
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 3744179b73fa..a94852af5510 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -733,8 +733,6 @@ static int ocfs2_fiemap_inline(struct inode *inode, struct buffer_head *di_bh,
return 0;
}
-#define OCFS2_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC)
-
int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
u64 map_start, u64 map_len)
{
@@ -746,8 +744,7 @@ int ocfs2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
struct buffer_head *di_bh = NULL;
struct ocfs2_extent_rec rec;
- ret = fiemap_prep(inode, fieinfo, map_start, &map_len,
- OCFS2_FIEMAP_FLAGS);
+ ret = fiemap_prep(inode, fieinfo, map_start, &map_len, 0);
if (ret)
return ret;
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index b5fec3410556..c7cb883c47b8 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -462,10 +462,6 @@ static int ovl_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
return -EOPNOTSUPP;
old_cred = ovl_override_creds(inode->i_sb);
-
- if (fieinfo->fi_flags & FIEMAP_FLAG_SYNC)
- filemap_write_and_wait(realinode->i_mapping);
-
err = realinode->i_op->fiemap(realinode, fieinfo, start, len);
revert_creds(old_cred);