Merge tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes

Pull gfs2 fixes from Steven Whitehouse:
 "Here are a number of small fixes for GFS2.

  There is a fix for FIEMAP on large sparse files, a negative dentry
  hashing fix, a fix for flock, and a bug fix relating to d_splice_alias
  usage.

  There are also (patches 1 and 5) a couple of updates which are less
  critical, but small and low risk"

* tag 'gfs2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-3.0-fixes:
  GFS2: fix d_splice_alias() misuses
  GFS2: Don't use MAXQUOTAS value
  GFS2: Hash the negative dentry during inode lookup
  GFS2: Request demote when a "try" flock fails
  GFS2: Change maxlen variables to size_t
  GFS2: fs/gfs2/super.c: replace seq_printf by seq_puts

fs/gfs2/bmap.c

@@ -359,7 +359,7 @@ static inline void release_metapath(struct metapath *mp)
  * Returns: The length of the extent (minimum of one block)
  */
 
-static inline unsigned int gfs2_extent_length(void *start, unsigned int len, __be64 *ptr, unsigned limit, int *eob)
+static inline unsigned int gfs2_extent_length(void *start, unsigned int len, __be64 *ptr, size_t limit, int *eob)
 {
 	const __be64 *end = (start + len);
 	const __be64 *first = ptr;
@@ -449,7 +449,7 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
 			   struct buffer_head *bh_map, struct metapath *mp,
 			   const unsigned int sheight,
 			   const unsigned int height,
-			   const unsigned int maxlen)
+			   const size_t maxlen)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
@@ -483,7 +483,8 @@ static int gfs2_bmap_alloc(struct inode *inode, const sector_t lblock,
 	} else {
 		/* Need to allocate indirect blocks */
 		ptrs_per_blk = height > 1 ? sdp->sd_inptrs : sdp->sd_diptrs;
-		dblks = min(maxlen, ptrs_per_blk - mp->mp_list[end_of_metadata]);
+		dblks = min(maxlen, (size_t)(ptrs_per_blk -
+					     mp->mp_list[end_of_metadata]));
 		if (height == ip->i_height) {
 			/* Writing into existing tree, extend tree down */
 			iblks = height - sheight;
@@ -605,7 +606,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	unsigned int bsize = sdp->sd_sb.sb_bsize;
-	const unsigned int maxlen = bh_map->b_size >> inode->i_blkbits;
+	const size_t maxlen = bh_map->b_size >> inode->i_blkbits;
 	const u64 *arr = sdp->sd_heightsize;
 	__be64 *ptr;
 	u64 size;

fs/gfs2/file.c

@@ -26,6 +26,7 @@
 #include <linux/dlm.h>
 #include <linux/dlm_plock.h>
 #include <linux/aio.h>
+#include <linux/delay.h>
 
 #include "gfs2.h"
 #include "incore.h"
@@ -979,9 +980,10 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 	unsigned int state;
 	int flags;
 	int error = 0;
+	int sleeptime;
 
 	state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
-	flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY) | GL_EXACT;
+	flags = (IS_SETLKW(cmd) ? 0 : LM_FLAG_TRY_1CB) | GL_EXACT;
 
 	mutex_lock(&fp->f_fl_mutex);
 
@@ -1001,7 +1003,14 @@ static int do_flock(struct file *file, int cmd, struct file_lock *fl)
 		gfs2_holder_init(gl, state, flags, fl_gh);
 		gfs2_glock_put(gl);
 	}
-	error = gfs2_glock_nq(fl_gh);
+	for (sleeptime = 1; sleeptime <= 4; sleeptime <<= 1) {
+		error = gfs2_glock_nq(fl_gh);
+		if (error != GLR_TRYFAILED)
+			break;
+		fl_gh->gh_flags = LM_FLAG_TRY | GL_EXACT;
+		fl_gh->gh_error = 0;
+		msleep(sleeptime);
+	}
 	if (error) {
 		gfs2_holder_uninit(fl_gh);
 		if (error == GLR_TRYFAILED)
@@ -1024,7 +1033,7 @@ static void do_unflock(struct file *file, struct file_lock *fl)
 	mutex_lock(&fp->f_fl_mutex);
 	flock_lock_file_wait(file, fl);
 	if (fl_gh->gh_gl) {
-		gfs2_glock_dq_wait(fl_gh);
+		gfs2_glock_dq(fl_gh);
 		gfs2_holder_uninit(fl_gh);
 	}
 	mutex_unlock(&fp->f_fl_mutex);

fs/gfs2/incore.h

@@ -262,6 +262,9 @@ struct gfs2_holder {
 	unsigned long gh_ip;
 };
 
+/* Number of quota types we support */
+#define GFS2_MAXQUOTAS 2
+
 /* Resource group multi-block reservation, in order of appearance:
 
    Step 1. Function prepares to write, allocates a mb, sets the size hint.
@@ -282,8 +285,8 @@ struct gfs2_blkreserv {
 	u64 rs_inum;                  /* Inode number for reservation */
 
 	/* ancillary quota stuff */
-	struct gfs2_quota_data *rs_qa_qd[2 * MAXQUOTAS];
-	struct gfs2_holder rs_qa_qd_ghs[2 * MAXQUOTAS];
+	struct gfs2_quota_data *rs_qa_qd[2 * GFS2_MAXQUOTAS];
+	struct gfs2_holder rs_qa_qd_ghs[2 * GFS2_MAXQUOTAS];
 	unsigned int rs_qa_qd_num;
 };
 

fs/gfs2/inode.c

@@ -626,8 +626,10 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
 	if (!IS_ERR(inode)) {
 		d = d_splice_alias(inode, dentry);
 		error = PTR_ERR(d);
-		if (IS_ERR(d))
+		if (IS_ERR(d)) {
+			inode = ERR_CAST(d);
 			goto fail_gunlock;
+		}
 		error = 0;
 		if (file) {
 			if (S_ISREG(inode->i_mode)) {
@@ -840,8 +842,10 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
 	int error;
 
 	inode = gfs2_lookupi(dir, &dentry->d_name, 0);
-	if (!inode)
+	if (inode == NULL) {
+		d_add(dentry, NULL);
 		return NULL;
+	}
 	if (IS_ERR(inode))
 		return ERR_CAST(inode);
 
@@ -854,7 +858,6 @@ static struct dentry *__gfs2_lookup(struct inode *dir, struct dentry *dentry,
 
 	d = d_splice_alias(inode, dentry);
 	if (IS_ERR(d)) {
-		iput(inode);
 		gfs2_glock_dq_uninit(&gh);
 		return d;
 	}

fs/gfs2/super.c

@@ -1294,7 +1294,7 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
 	int val;
 
 	if (is_ancestor(root, sdp->sd_master_dir))
-		seq_printf(s, ",meta");
+		seq_puts(s, ",meta");
 	if (args->ar_lockproto[0])
 		seq_printf(s, ",lockproto=%s", args->ar_lockproto);
 	if (args->ar_locktable[0])
@@ -1302,13 +1302,13 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
 	if (args->ar_hostdata[0])
 		seq_printf(s, ",hostdata=%s", args->ar_hostdata);
 	if (args->ar_spectator)
-		seq_printf(s, ",spectator");
+		seq_puts(s, ",spectator");
 	if (args->ar_localflocks)
-		seq_printf(s, ",localflocks");
+		seq_puts(s, ",localflocks");
 	if (args->ar_debug)
-		seq_printf(s, ",debug");
+		seq_puts(s, ",debug");
 	if (args->ar_posix_acl)
-		seq_printf(s, ",acl");
+		seq_puts(s, ",acl");
 	if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
 		char *state;
 		switch (args->ar_quota) {
@@ -1328,7 +1328,7 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
 		seq_printf(s, ",quota=%s", state);
 	}
 	if (args->ar_suiddir)
-		seq_printf(s, ",suiddir");
+		seq_puts(s, ",suiddir");
 	if (args->ar_data != GFS2_DATA_DEFAULT) {
 		char *state;
 		switch (args->ar_data) {
@@ -1345,7 +1345,7 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
 		seq_printf(s, ",data=%s", state);
 	}
 	if (args->ar_discard)
-		seq_printf(s, ",discard");
+		seq_puts(s, ",discard");
 	val = sdp->sd_tune.gt_logd_secs;
 	if (val != 30)
 		seq_printf(s, ",commit=%d", val);
@@ -1376,11 +1376,11 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
 		seq_printf(s, ",errors=%s", state);
 	}
 	if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
-		seq_printf(s, ",nobarrier");
+		seq_puts(s, ",nobarrier");
 	if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
-		seq_printf(s, ",demote_interface_used");
+		seq_puts(s, ",demote_interface_used");
 	if (args->ar_rgrplvb)
-		seq_printf(s, ",rgrplvb");
+		seq_puts(s, ",rgrplvb");
 	return 0;
 }