The Linux xattr and acl APIs use a single call for set and remove.
Modify the high-level XFS API to match that and let xfs_attr_set handle
removing attributes as well. With a little bit of reordering this
removes a lot of code.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Chandan Rajendra <chandanrlinux@xxxxxxxxx>
Reviewed-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Signed-off-by: Allison Collins <allison.henderson@xxxxxxxxxx>
---
db/attrset.c | 3 +-
libxfs/libxfs_api_defs.h | 1 -
libxfs/xfs_attr.c | 179 +++++++++++++++++------------------------------
libxfs/xfs_attr.h | 2 -
4 files changed, 65 insertions(+), 120 deletions(-)
diff --git a/db/attrset.c b/db/attrset.c
index d96b78d..708e71e3 100644
--- a/db/attrset.c
+++ b/db/attrset.c
@@ -222,7 +222,8 @@ attr_remove_f(
goto out;
}
- if (libxfs_attr_remove(ip, (unsigned char *)name, strlen(name), flags)){
+ if (libxfs_attr_set(ip, (unsigned char *)name, strlen(name), NULL, 0,
+ flags)){
dbprintf(_("failed to remove attr %s from inode %llu\n"),
name, (unsigned long long)iocur_top->ino);
goto out;
diff --git a/libxfs/libxfs_api_defs.h b/libxfs/libxfs_api_defs.h
index 1149e30..0ffad20 100644
--- a/libxfs/libxfs_api_defs.h
+++ b/libxfs/libxfs_api_defs.h
@@ -32,7 +32,6 @@
#define xfs_attr_get libxfs_attr_get
#define xfs_attr_leaf_newentsize libxfs_attr_leaf_newentsize
#define xfs_attr_namecheck libxfs_attr_namecheck
-#define xfs_attr_remove libxfs_attr_remove
#define xfs_attr_set libxfs_attr_set
#define xfs_bmapi_read libxfs_bmapi_read
diff --git a/libxfs/xfs_attr.c b/libxfs/xfs_attr.c
index 5110bb4..6c56428 100644
--- a/libxfs/xfs_attr.c
+++ b/libxfs/xfs_attr.c
@@ -23,6 +23,7 @@
#include "xfs_attr_remote.h"
#include "xfs_trans_space.h"
#include "xfs_trace.h"
+#include "xfs_quota_defs.h"
/*
* xfs_attr.c
@@ -335,6 +336,10 @@ xfs_attr_remove_args(
return error;
}
+/*
+ * Note: If value is NULL the attribute will be removed, just like the
+ * Linux ->setattr API.
+ */
int
xfs_attr_set(
struct xfs_inode *dp,
@@ -349,149 +354,92 @@ xfs_attr_set(
struct xfs_trans_res tres;
int rsvd = (flags & ATTR_ROOT) != 0;
int error, local;
-
- XFS_STATS_INC(mp, xs_attr_set);
+ unsigned int total;
if (XFS_FORCED_SHUTDOWN(dp->i_mount))
return -EIO;
- error = xfs_attr_args_init(&args, dp, name, namelen, flags);
- if (error)
- return error;
-
- args.value = value;
- args.valuelen = valuelen;
- args.op_flags = XFS_DA_OP_ADDNAME | XFS_DA_OP_OKNOENT;
- args.total = xfs_attr_calc_size(&args, &local);
-
error = xfs_qm_dqattach(dp);
if (error)
return error;
- /*
- * If the inode doesn't have an attribute fork, add one.
- * (inode must not be locked when we call this routine)
- */
- if (XFS_IFORK_Q(dp) == 0) {
- int sf_size = sizeof(xfs_attr_sf_hdr_t) +
- XFS_ATTR_SF_ENTSIZE_BYNAME(args.namelen, valuelen);
-
- error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
- if (error)
- return error;
- }
-
- tres.tr_logres = M_RES(mp)->tr_attrsetm.tr_logres +
- M_RES(mp)->tr_attrsetrt.tr_logres * args.total;
- tres.tr_logcount = XFS_ATTRSET_LOG_COUNT;
- tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
-
- /*
- * Root fork attributes can use reserved data blocks for this
- * operation if necessary
- */
- error = xfs_trans_alloc(mp, &tres, args.total, 0,
- rsvd ? XFS_TRANS_RESERVE : 0, &args.trans);
+ error = xfs_attr_args_init(&args, dp, name, namelen, flags);
if (error)
return error;
- xfs_ilock(dp, XFS_ILOCK_EXCL);
- error = xfs_trans_reserve_quota_nblks(args.trans, dp, args.total, 0,
- rsvd ? XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_FORCE_RES :
- XFS_QMOPT_RES_REGBLKS);
- if (error)
- goto out_trans_cancel;
-
- xfs_trans_ijoin(args.trans, dp, 0);
- error = xfs_attr_set_args(&args);
- if (error)
- goto out_trans_cancel;
- if (!args.trans) {
- /* shortform attribute has already been committed */
- goto out_unlock;
- }
-
- /*
- * If this is a synchronous mount, make sure that the
- * transaction goes to disk before returning to the user.
- */
- if (mp->m_flags & XFS_MOUNT_WSYNC)
- xfs_trans_set_sync(args.trans);
-
- if ((flags & ATTR_KERNOTIME) == 0)
- xfs_trans_ichgtime(args.trans, dp, XFS_ICHGTIME_CHG);
+ args.value = value;
+ args.valuelen = valuelen;
/*
- * Commit the last in the sequence of transactions.
+ * We have no control over the attribute names that userspace passes us
+ * to remove, so we have to allow the name lookup prior to attribute
+ * removal to fail as well.
*/
- xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
- error = xfs_trans_commit(args.trans);
-out_unlock:
- xfs_iunlock(dp, XFS_ILOCK_EXCL);
- return error;
-
-out_trans_cancel:
- if (args.trans)
- xfs_trans_cancel(args.trans);
- goto out_unlock;
-}
+ args.op_flags = XFS_DA_OP_OKNOENT;
-/*
- * Generic handler routine to remove a name from an attribute list.
- * Transitions attribute list from Btree to shortform as necessary.
- */
-int
-xfs_attr_remove(
- struct xfs_inode *dp,
- const unsigned char *name,
- size_t namelen,
- int flags)
-{
- struct xfs_mount *mp = dp->i_mount;
- struct xfs_da_args args;
- int error;
+ if (value) {
+ XFS_STATS_INC(mp, xs_attr_set);
- XFS_STATS_INC(mp, xs_attr_remove);
+ args.op_flags |= XFS_DA_OP_ADDNAME;
+ args.total = xfs_attr_calc_size(&args, &local);
- if (XFS_FORCED_SHUTDOWN(dp->i_mount))
- return -EIO;
+ /*
+ * If the inode doesn't have an attribute fork, add one.
+ * (inode must not be locked when we call this routine)
+ */
+ if (XFS_IFORK_Q(dp) == 0) {
+ int sf_size = sizeof(struct xfs_attr_sf_hdr) +
+ XFS_ATTR_SF_ENTSIZE_BYNAME(args.namelen,
+ valuelen);
- error = xfs_attr_args_init(&args, dp, name, namelen, flags);
- if (error)
- return error;
+ error = xfs_bmap_add_attrfork(dp, sf_size, rsvd);
+ if (error)
+ return error;
+ }
- /*
- * we have no control over the attribute names that userspace passes us
- * to remove, so we have to allow the name lookup prior to attribute
- * removal to fail.
- */
- args.op_flags = XFS_DA_OP_OKNOENT;
+ tres.tr_logres = M_RES(mp)->tr_attrsetm.tr_logres +
+ M_RES(mp)->tr_attrsetrt.tr_logres * args.total;
+ tres.tr_logcount = XFS_ATTRSET_LOG_COUNT;
+ tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
+ total = args.total;
+ } else {
+ XFS_STATS_INC(mp, xs_attr_remove);
- error = xfs_qm_dqattach(dp);
- if (error)
- return error;
+ tres = M_RES(mp)->tr_attrrm;
+ total = XFS_ATTRRM_SPACE_RES(mp);
+ }
/*
* Root fork attributes can use reserved data blocks for this
* operation if necessary
*/
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_attrrm,
- XFS_ATTRRM_SPACE_RES(mp), 0,
- (flags & ATTR_ROOT) ? XFS_TRANS_RESERVE : 0,
- &args.trans);
+ error = xfs_trans_alloc(mp, &tres, total, 0,
+ rsvd ? XFS_TRANS_RESERVE : 0, &args.trans);
if (error)
return error;
xfs_ilock(dp, XFS_ILOCK_EXCL);
- /*
- * No need to make quota reservations here. We expect to release some
- * blocks not allocate in the common case.
- */
xfs_trans_ijoin(args.trans, dp, 0);
+ if (value) {
+ unsigned int quota_flags = XFS_QMOPT_RES_REGBLKS;
- error = xfs_attr_remove_args(&args);
- if (error)
- goto out;
+ if (rsvd)
+ quota_flags |= XFS_QMOPT_FORCE_RES;
+ error = xfs_trans_reserve_quota_nblks(args.trans, dp,
+ args.total, 0, quota_flags);
+ if (error)
+ goto out_trans_cancel;
+ error = xfs_attr_set_args(&args);
+ if (error)
+ goto out_trans_cancel;
+ /* shortform attribute has already been committed */
+ if (!args.trans)
+ goto out_unlock;
+ } else {
+ error = xfs_attr_remove_args(&args);
+ if (error)
+ goto out_trans_cancel;
+ }
/*
* If this is a synchronous mount, make sure that the
@@ -508,15 +456,14 @@ xfs_attr_remove(
*/
xfs_trans_log_inode(args.trans, dp, XFS_ILOG_CORE);
error = xfs_trans_commit(args.trans);
+out_unlock:
xfs_iunlock(dp, XFS_ILOCK_EXCL);
-
return error;
-out:
+out_trans_cancel:
if (args.trans)
xfs_trans_cancel(args.trans);
- xfs_iunlock(dp, XFS_ILOCK_EXCL);
- return error;
+ goto out_unlock;
}
/*========================================================================
diff --git a/libxfs/xfs_attr.h b/libxfs/xfs_attr.h
index 71bcf12..db58a6c 100644
--- a/libxfs/xfs_attr.h
+++ b/libxfs/xfs_attr.h
@@ -152,8 +152,6 @@ int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
size_t namelen, unsigned char *value, int valuelen, int flags);
int xfs_attr_set_args(struct xfs_da_args *args);
-int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name,
- size_t namelen, int flags);
int xfs_attr_remove_args(struct xfs_da_args *args);
int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
int flags, struct attrlist_cursor_kern *cursor);
--
2.7.4
