#include "xfs_trace.h"
#include "xfs_icache.h"
#include "xfs_bmap_util.h"
+#include "xfs_quota.h"
+#include "xfs_dquot_item.h"
+#include "xfs_dquot.h"
#include <linux/kthread.h>
#include <linux/freezer.h>
if (ip->i_ino != ino) {
trace_xfs_iget_skip(ip);
XFS_STATS_INC(xs_ig_frecycle);
- error = EAGAIN;
+ error = -EAGAIN;
goto out_error;
}
if (ip->i_flags & (XFS_INEW|XFS_IRECLAIM)) {
trace_xfs_iget_skip(ip);
XFS_STATS_INC(xs_ig_frecycle);
- error = EAGAIN;
+ error = -EAGAIN;
goto out_error;
}
* If lookup is racing with unlink return an error immediately.
*/
if (ip->i_d.di_mode == 0 && !(flags & XFS_IGET_CREATE)) {
- error = ENOENT;
+ error = -ENOENT;
goto out_error;
}
spin_unlock(&ip->i_flags_lock);
rcu_read_unlock();
- error = -inode_init_always(mp->m_super, inode);
+ error = inode_init_always(mp->m_super, inode);
if (error) {
/*
* Re-initializing the inode failed, and we are in deep
/* If the VFS inode is being torn down, pause and try again. */
if (!igrab(inode)) {
trace_xfs_iget_skip(ip);
- error = EAGAIN;
+ error = -EAGAIN;
goto out_error;
}
ip = xfs_inode_alloc(mp, ino);
if (!ip)
- return ENOMEM;
+ return -ENOMEM;
error = xfs_iread(mp, tp, ip, flags);
if (error)
trace_xfs_iget_miss(ip);
if ((ip->i_d.di_mode == 0) && !(flags & XFS_IGET_CREATE)) {
- error = ENOENT;
+ error = -ENOENT;
goto out_destroy;
}
* recurse into the file system.
*/
if (radix_tree_preload(GFP_NOFS)) {
- error = EAGAIN;
+ error = -EAGAIN;
goto out_destroy;
}
if (unlikely(error)) {
WARN_ON(error != -EEXIST);
XFS_STATS_INC(xs_ig_dup);
- error = EAGAIN;
+ error = -EAGAIN;
goto out_preload_end;
}
spin_unlock(&pag->pag_ici_lock);
/* reject inode numbers outside existing AGs */
if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount)
- return EINVAL;
+ return -EINVAL;
/* get the perag structure and ensure that it's inode capable */
pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ino));
return 0;
out_error_or_again:
- if (error == EAGAIN) {
+ if (error == -EAGAIN) {
delay(1);
goto again;
}
/* nothing to sync during shutdown */
if (XFS_FORCED_SHUTDOWN(ip->i_mount))
- return EFSCORRUPTED;
+ return -EFSCORRUPTED;
/* If we can't grab the inode, it must on it's way to reclaim. */
if (!igrab(inode))
- return ENOENT;
+ return -ENOENT;
/* inode is valid */
return 0;
out_unlock_noent:
spin_unlock(&ip->i_flags_lock);
- return ENOENT;
+ return -ENOENT;
}
STATIC int
continue;
error = execute(batch[i], flags, args);
IRELE(batch[i]);
- if (error == EAGAIN) {
+ if (error == -EAGAIN) {
skipped++;
continue;
}
- if (error && last_error != EFSCORRUPTED)
+ if (error && last_error != -EFSCORRUPTED)
last_error = error;
}
/* bail out if the filesystem is corrupted. */
- if (error == EFSCORRUPTED)
+ if (error == -EFSCORRUPTED)
break;
cond_resched();
xfs_perag_put(pag);
if (error) {
last_error = error;
- if (error == EFSCORRUPTED)
+ if (error == -EFSCORRUPTED)
break;
}
}
- return XFS_ERROR(last_error);
+ return last_error;
}
int
xfs_perag_put(pag);
if (error) {
last_error = error;
- if (error == EFSCORRUPTED)
+ if (error == -EFSCORRUPTED)
break;
}
}
- return XFS_ERROR(last_error);
+ return last_error;
}
/*
* see the stale flag set on the inode.
*/
error = xfs_iflush(ip, &bp);
- if (error == EAGAIN) {
+ if (error == -EAGAIN) {
xfs_iunlock(ip, XFS_ILOCK_EXCL);
/* backoff longer than in xfs_ifree_cluster */
delay(2);
xfs_iflags_clear(ip, XFS_IRECLAIM);
xfs_iunlock(ip, XFS_ILOCK_EXCL);
/*
- * We could return EAGAIN here to make reclaim rescan the inode tree in
+ * We could return -EAGAIN here to make reclaim rescan the inode tree in
* a short while. However, this just burns CPU time scanning the tree
* waiting for IO to complete and the reclaim work never goes back to
* the idle state. Instead, return 0 to let the next scheduled
if (!batch[i])
continue;
error = xfs_reclaim_inode(batch[i], pag, flags);
- if (error && last_error != EFSCORRUPTED)
+ if (error && last_error != -EFSCORRUPTED)
last_error = error;
}
trylock = 0;
goto restart;
}
- return XFS_ERROR(last_error);
+ return last_error;
}
int
return 1;
}
+/*
+ * A union-based inode filtering algorithm. Process the inode if any of the
+ * criteria match. This is for global/internal scans only.
+ */
+STATIC int
+xfs_inode_match_id_union(
+ struct xfs_inode *ip,
+ struct xfs_eofblocks *eofb)
+{
+ if ((eofb->eof_flags & XFS_EOF_FLAGS_UID) &&
+ uid_eq(VFS_I(ip)->i_uid, eofb->eof_uid))
+ return 1;
+
+ if ((eofb->eof_flags & XFS_EOF_FLAGS_GID) &&
+ gid_eq(VFS_I(ip)->i_gid, eofb->eof_gid))
+ return 1;
+
+ if ((eofb->eof_flags & XFS_EOF_FLAGS_PRID) &&
+ xfs_get_projid(ip) == eofb->eof_prid)
+ return 1;
+
+ return 0;
+}
+
STATIC int
xfs_inode_free_eofblocks(
struct xfs_inode *ip,
{
int ret;
struct xfs_eofblocks *eofb = args;
+ bool need_iolock = true;
+ int match;
+
+ ASSERT(!eofb || (eofb && eofb->eof_scan_owner != 0));
if (!xfs_can_free_eofblocks(ip, false)) {
/* inode could be preallocated or append-only */
return 0;
if (eofb) {
- if (!xfs_inode_match_id(ip, eofb))
+ if (eofb->eof_flags & XFS_EOF_FLAGS_UNION)
+ match = xfs_inode_match_id_union(ip, eofb);
+ else
+ match = xfs_inode_match_id(ip, eofb);
+ if (!match)
return 0;
/* skip the inode if the file size is too small */
if (eofb->eof_flags & XFS_EOF_FLAGS_MINFILESIZE &&
XFS_ISIZE(ip) < eofb->eof_min_file_size)
return 0;
+
+ /*
+ * A scan owner implies we already hold the iolock. Skip it in
+ * xfs_free_eofblocks() to avoid deadlock. This also eliminates
+ * the possibility of EAGAIN being returned.
+ */
+ if (eofb->eof_scan_owner == ip->i_ino)
+ need_iolock = false;
}
- ret = xfs_free_eofblocks(ip->i_mount, ip, true);
+ ret = xfs_free_eofblocks(ip->i_mount, ip, need_iolock);
/* don't revisit the inode if we're not waiting */
- if (ret == EAGAIN && !(flags & SYNC_WAIT))
+ if (ret == -EAGAIN && !(flags & SYNC_WAIT))
ret = 0;
return ret;
eofb, XFS_ICI_EOFBLOCKS_TAG);
}
+/*
+ * Run eofblocks scans on the quotas applicable to the inode. For inodes with
+ * multiple quotas, we don't know exactly which quota caused an allocation
+ * failure. We make a best effort by including each quota under low free space
+ * conditions (less than 1% free space) in the scan.
+ */
+int
+xfs_inode_free_quota_eofblocks(
+ struct xfs_inode *ip)
+{
+ int scan = 0;
+ struct xfs_eofblocks eofb = {0};
+ struct xfs_dquot *dq;
+
+ ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
+
+ /*
+ * Set the scan owner to avoid a potential livelock. Otherwise, the scan
+ * can repeatedly trylock on the inode we're currently processing. We
+ * run a sync scan to increase effectiveness and use the union filter to
+ * cover all applicable quotas in a single scan.
+ */
+ eofb.eof_scan_owner = ip->i_ino;
+ eofb.eof_flags = XFS_EOF_FLAGS_UNION|XFS_EOF_FLAGS_SYNC;
+
+ if (XFS_IS_UQUOTA_ENFORCED(ip->i_mount)) {
+ dq = xfs_inode_dquot(ip, XFS_DQ_USER);
+ if (dq && xfs_dquot_lowsp(dq)) {
+ eofb.eof_uid = VFS_I(ip)->i_uid;
+ eofb.eof_flags |= XFS_EOF_FLAGS_UID;
+ scan = 1;
+ }
+ }
+
+ if (XFS_IS_GQUOTA_ENFORCED(ip->i_mount)) {
+ dq = xfs_inode_dquot(ip, XFS_DQ_GROUP);
+ if (dq && xfs_dquot_lowsp(dq)) {
+ eofb.eof_gid = VFS_I(ip)->i_gid;
+ eofb.eof_flags |= XFS_EOF_FLAGS_GID;
+ scan = 1;
+ }
+ }
+
+ if (scan)
+ xfs_icache_free_eofblocks(ip->i_mount, &eofb);
+
+ return scan;
+}
+
void
xfs_inode_set_eofblocks_tag(
xfs_inode_t *ip)
projects / firefly-linux-kernel-4.4.55.git / blobdiff