[PATCH v6 07/10] xfs: add inode id filtering to eofblocks scan

Brian Foster
2012-11-06T14:46:58Z

Support inode ID filtering in the eofblocks scan. The caller must
set the associated XFS_EOF_FLAGS_*ID bit and ID field.

Signed-off-by: Brian Foster <bfoster@redhat.com>
---
fs/xfs/xfs_fs.h | 11 +++++++++--
fs/xfs/xfs_icache.c | 22 ++++++++++++++++++++++
2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_fs.h b/fs/xfs/xfs_fs.h
index 26ff43a..88eb1bc 100644
--- a/fs/xfs/xfs_fs.h
+++ b/fs/xfs/xfs_fs.h
@@ -345,13 +345,20 @@ typedef struct xfs_error_injection {
struct xfs_eofblocks {
__u32 eof_version;
__u32 eof_flags;
- __u64 pad[15];
+ uid_t eof_uid;
+ gid_t eof_gid;
+ prid_t eof_prid;
+ __u32 pad[27];
};

/* eof_flags values */
#define XFS_EOF_FLAGS_SYNC (1 << 0) /* sync/wait mode scan */
+#define XFS_EOF_FLAGS_UID (1 << 1) /* filter by uid */
+#define XFS_EOF_FLAGS_GID (1 << 2) /* filter by gid */
+#define XFS_EOF_FLAGS_PRID (1 << 3) /* filter by project id */
#define XFS_EOF_FLAGS_VALID \
- (XFS_EOF_FLAGS_SYNC)
+ (XFS_EOF_FLAGS_SYNC|XFS_EOF_FLAGS_UID|XFS_EOF_FLAGS_GID| \
+ XFS_EOF_FLAGS_PRID)

/*
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index d0d9273..699d1b0 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -1171,6 +1171,21 @@ xfs_reclaim_inodes_count(
}

STATIC int
+xfs_inode_match_id(
+ struct xfs_inode *ip,
+ struct xfs_eofblocks *eofb)
+{
+ if (eofb->eof_flags & XFS_EOF_FLAGS_UID)
+ return ip->i_d.di_uid == eofb->eof_uid;
+ else if (eofb->eof_flags & XFS_EOF_FLAGS_GID)
+ return ip->i_d.di_gid == eofb->eof_gid;
+ else if (eofb->eof_flags & XFS_EOF_FLAGS_PRID)
+ return xfs_get_projid(ip) == eofb->eof_prid;
+
+ return 0;
+}
+
+STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
struct xfs_perag *pag,
@@ -1178,6 +1193,7 @@ xfs_inode_free_eofblocks(
void *args)
{
int ret;
+ struct xfs_eofblocks *eofb = args;

if (!xfs_can_free_eofblocks(ip, false)) {
/* inode could be preallocated or append-only */
@@ -1194,6 +1210,12 @@ xfs_inode_free_eofblocks(
mapping_tagged(VFS_I(ip)->i_mapping, PAGECACHE_TAG_DIRTY))
return 0;

+ if (eofb &&
+ (eofb->eof_flags & (XFS_EOF_FLAGS_UID|XFS_EOF_FLAGS_GID|
+ XFS_EOF_FLAGS_PRID)) &&
+ !xfs_inode_match_id(ip, eofb))
+ return 0;
+
ret = xfs_free_eofblocks(ip->i_mount, ip, true);

/* don't revisit the inode if we're not waiting */
--
1.7.7.6