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authorAndrew Price <anprice@redhat.com>2014-11-12 17:24:03 +0000
committerSteven Whitehouse <swhiteho@redhat.com>2014-11-14 14:14:30 +0000
commit9c9f1159a54c6163dd0b9d2085985d3c98dad11f (patch)
treed65c967f3dc7d604a73b020ed80a13839c6548b9 /fs
parent1a8550332a7f0111306b6b34e44a7c696ef68c4d (diff)
downloadlinux-9c9f1159a54c6163dd0b9d2085985d3c98dad11f.tar.bz2
GFS2: Use inode_newsize_ok and get_write_access in fallocate
gfs2_fallocate wasn't checking inode_newsize_ok nor get_write_access. Split out the context setup and inode locking pieces into a separate function to make it more clear and add these missing calls. inode_newsize_ok is called conditional on FALLOC_FL_KEEP_SIZE as there is no need to enforce a file size limit if it isn't going to change. Signed-off-by: Andrew Price <anprice@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/gfs2/file.c66
1 files changed, 44 insertions, 22 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 5ebe56831794..3786579dd348 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -797,8 +797,7 @@ static void calc_max_reserv(struct gfs2_inode *ip, loff_t max, loff_t *len,
}
}
-static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
- loff_t len)
+static long __gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
{
struct inode *inode = file_inode(file);
struct gfs2_sbd *sdp = GFS2_SB(inode);
@@ -812,14 +811,9 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
loff_t bsize_mask = ~((loff_t)sdp->sd_sb.sb_bsize - 1);
loff_t next = (offset + len - 1) >> sdp->sd_sb.sb_bsize_shift;
loff_t max_chunk_size = UINT_MAX & bsize_mask;
- struct gfs2_holder gh;
next = (next + 1) << sdp->sd_sb.sb_bsize_shift;
- /* We only support the FALLOC_FL_KEEP_SIZE mode */
- if (mode & ~FALLOC_FL_KEEP_SIZE)
- return -EOPNOTSUPP;
-
offset &= bsize_mask;
len = next - offset;
@@ -830,17 +824,6 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
if (bytes == 0)
bytes = sdp->sd_sb.sb_bsize;
- error = gfs2_rs_alloc(ip);
- if (error)
- return error;
-
- mutex_lock(&inode->i_mutex);
-
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
- error = gfs2_glock_nq(&gh);
- if (unlikely(error))
- goto out_uninit;
-
gfs2_size_hint(file, offset, len);
while (len > 0) {
@@ -853,8 +836,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
}
error = gfs2_quota_lock_check(ip);
if (error)
- goto out_unlock;
-
+ return error;
retry:
gfs2_write_calc_reserv(ip, bytes, &data_blocks, &ind_blocks);
@@ -898,18 +880,58 @@ retry:
if (error == 0)
error = generic_write_sync(file, pos, count);
- goto out_unlock;
+ return error;
out_trans_fail:
gfs2_inplace_release(ip);
out_qunlock:
gfs2_quota_unlock(ip);
+ return error;
+}
+
+static long gfs2_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
+{
+ struct inode *inode = file_inode(file);
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
+ int ret;
+
+ if (mode & ~FALLOC_FL_KEEP_SIZE)
+ return -EOPNOTSUPP;
+
+ mutex_lock(&inode->i_mutex);
+
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ ret = gfs2_glock_nq(&gh);
+ if (ret)
+ goto out_uninit;
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+ (offset + len) > inode->i_size) {
+ ret = inode_newsize_ok(inode, offset + len);
+ if (ret)
+ goto out_unlock;
+ }
+
+ ret = get_write_access(inode);
+ if (ret)
+ goto out_unlock;
+
+ ret = gfs2_rs_alloc(ip);
+ if (ret)
+ goto out_putw;
+
+ ret = __gfs2_fallocate(file, mode, offset, len);
+ if (ret)
+ gfs2_rs_deltree(ip->i_res);
+out_putw:
+ put_write_access(inode);
out_unlock:
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);
mutex_unlock(&inode->i_mutex);
- return error;
+ return ret;
}
#ifdef CONFIG_GFS2_FS_LOCKING_DLM