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-rw-r--r--fs/gfs2/dir.c91
-rw-r--r--fs/gfs2/incore.h3
-rw-r--r--fs/gfs2/ops_fstype.c3
-rw-r--r--fs/gfs2/super.c12
4 files changed, 89 insertions, 20 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 4ee008c6d64b..6a92592304fb 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -82,6 +82,8 @@
#define gfs2_disk_hash2offset(h) (((u64)(h)) >> 1)
#define gfs2_dir_offset2hash(p) ((u32)(((u64)(p)) << 1))
+#define GFS2_HASH_INDEX_MASK 0xffffc000
+#define GFS2_USE_HASH_FLAG 0x2000
struct qstr gfs2_qdot __read_mostly;
struct qstr gfs2_qdotdot __read_mostly;
@@ -1223,10 +1225,10 @@ static int compare_dents(const void *a, const void *b)
int ret = 0;
dent_a = *(const struct gfs2_dirent **)a;
- hash_a = be32_to_cpu(dent_a->de_hash);
+ hash_a = dent_a->de_cookie;
dent_b = *(const struct gfs2_dirent **)b;
- hash_b = be32_to_cpu(dent_b->de_hash);
+ hash_b = dent_b->de_cookie;
if (hash_a > hash_b)
ret = 1;
@@ -1264,19 +1266,20 @@ static int compare_dents(const void *a, const void *b)
*/
static int do_filldir_main(struct gfs2_inode *dip, struct dir_context *ctx,
- const struct gfs2_dirent **darr, u32 entries,
- int *copied)
+ struct gfs2_dirent **darr, u32 entries,
+ u32 sort_start, int *copied)
{
const struct gfs2_dirent *dent, *dent_next;
u64 off, off_next;
unsigned int x, y;
int run = 0;
- sort(darr, entries, sizeof(struct gfs2_dirent *), compare_dents, NULL);
+ if (sort_start < entries)
+ sort(&darr[sort_start], entries - sort_start,
+ sizeof(struct gfs2_dirent *), compare_dents, NULL);
dent_next = darr[0];
- off_next = be32_to_cpu(dent_next->de_hash);
- off_next = gfs2_disk_hash2offset(off_next);
+ off_next = dent_next->de_cookie;
for (x = 0, y = 1; x < entries; x++, y++) {
dent = dent_next;
@@ -1284,8 +1287,7 @@ static int do_filldir_main(struct gfs2_inode *dip, struct dir_context *ctx,
if (y < entries) {
dent_next = darr[y];
- off_next = be32_to_cpu(dent_next->de_hash);
- off_next = gfs2_disk_hash2offset(off_next);
+ off_next = dent_next->de_cookie;
if (off < ctx->pos)
continue;
@@ -1332,6 +1334,40 @@ static void *gfs2_alloc_sort_buffer(unsigned size)
return ptr;
}
+
+static int gfs2_set_cookies(struct gfs2_sbd *sdp, struct buffer_head *bh,
+ unsigned leaf_nr, struct gfs2_dirent **darr,
+ unsigned entries)
+{
+ int sort_id = -1;
+ int i;
+
+ for (i = 0; i < entries; i++) {
+ unsigned offset;
+
+ darr[i]->de_cookie = be32_to_cpu(darr[i]->de_hash);
+ darr[i]->de_cookie = gfs2_disk_hash2offset(darr[i]->de_cookie);
+
+ if (!sdp->sd_args.ar_loccookie)
+ continue;
+ offset = (char *)(darr[i]) -
+ (bh->b_data + gfs2_dirent_offset(bh->b_data));
+ offset /= GFS2_MIN_DIRENT_SIZE;
+ offset += leaf_nr * sdp->sd_max_dents_per_leaf;
+ if (offset >= GFS2_USE_HASH_FLAG ||
+ leaf_nr >= GFS2_USE_HASH_FLAG) {
+ darr[i]->de_cookie |= GFS2_USE_HASH_FLAG;
+ if (sort_id < 0)
+ sort_id = i;
+ continue;
+ }
+ darr[i]->de_cookie &= GFS2_HASH_INDEX_MASK;
+ darr[i]->de_cookie |= offset;
+ }
+ return sort_id;
+}
+
+
static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
int *copied, unsigned *depth,
u64 leaf_no)
@@ -1341,12 +1377,11 @@ static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
struct buffer_head *bh;
struct gfs2_leaf *lf;
unsigned entries = 0, entries2 = 0;
- unsigned leaves = 0;
- const struct gfs2_dirent **darr, *dent;
+ unsigned leaves = 0, leaf = 0, offset, sort_offset;
+ struct gfs2_dirent **darr, *dent;
struct dirent_gather g;
struct buffer_head **larr;
- int leaf = 0;
- int error, i;
+ int error, i, need_sort = 0, sort_id;
u64 lfn = leaf_no;
do {
@@ -1362,6 +1397,11 @@ static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
brelse(bh);
} while(lfn);
+ if (*depth < GFS2_DIR_MAX_DEPTH || !sdp->sd_args.ar_loccookie) {
+ need_sort = 1;
+ sort_offset = 0;
+ }
+
if (!entries)
return 0;
@@ -1375,8 +1415,8 @@ static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
larr = gfs2_alloc_sort_buffer((leaves + entries + 99) * sizeof(void *));
if (!larr)
goto out;
- darr = (const struct gfs2_dirent **)(larr + leaves);
- g.pdent = darr;
+ darr = (struct gfs2_dirent **)(larr + leaves);
+ g.pdent = (const struct gfs2_dirent **)darr;
g.offset = 0;
lfn = leaf_no;
@@ -1387,6 +1427,7 @@ static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
lf = (struct gfs2_leaf *)bh->b_data;
lfn = be64_to_cpu(lf->lf_next);
if (lf->lf_entries) {
+ offset = g.offset;
entries2 += be16_to_cpu(lf->lf_entries);
dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
gfs2_dirent_gather, NULL, &g);
@@ -1404,17 +1445,26 @@ static int gfs2_dir_read_leaf(struct inode *inode, struct dir_context *ctx,
goto out_free;
}
error = 0;
+ sort_id = gfs2_set_cookies(sdp, bh, leaf, &darr[offset],
+ be16_to_cpu(lf->lf_entries));
+ if (!need_sort && sort_id >= 0) {
+ need_sort = 1;
+ sort_offset = offset + sort_id;
+ }
larr[leaf++] = bh;
} else {
+ larr[leaf++] = NULL;
brelse(bh);
}
} while(lfn);
BUG_ON(entries2 != entries);
- error = do_filldir_main(ip, ctx, darr, entries, copied);
+ error = do_filldir_main(ip, ctx, darr, entries, need_sort ?
+ sort_offset : entries, copied);
out_free:
for(i = 0; i < leaf; i++)
- brelse(larr[i]);
+ if (larr[i])
+ brelse(larr[i]);
kvfree(larr);
out:
return error;
@@ -1520,7 +1570,7 @@ int gfs2_dir_read(struct inode *inode, struct dir_context *ctx,
struct gfs2_inode *dip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
struct dirent_gather g;
- const struct gfs2_dirent **darr, *dent;
+ struct gfs2_dirent **darr, *dent;
struct buffer_head *dibh;
int copied = 0;
int error;
@@ -1544,7 +1594,7 @@ int gfs2_dir_read(struct inode *inode, struct dir_context *ctx,
/* 96 is max number of dirents which can be stuffed into an inode */
darr = kmalloc(96 * sizeof(struct gfs2_dirent *), GFP_NOFS);
if (darr) {
- g.pdent = darr;
+ g.pdent = (const struct gfs2_dirent **)darr;
g.offset = 0;
dent = gfs2_dirent_scan(inode, dibh->b_data, dibh->b_size,
gfs2_dirent_gather, NULL, &g);
@@ -1561,8 +1611,9 @@ int gfs2_dir_read(struct inode *inode, struct dir_context *ctx,
error = -EIO;
goto out;
}
+ gfs2_set_cookies(sdp, dibh, 0, darr, dip->i_entries);
error = do_filldir_main(dip, ctx, darr,
- dip->i_entries, &copied);
+ dip->i_entries, 0, &copied);
out:
kfree(darr);
}
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 921304e1d785..845fb09cc606 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -562,6 +562,8 @@ struct gfs2_args {
unsigned int ar_errors:2; /* errors=withdraw | panic */
unsigned int ar_nobarrier:1; /* do not send barriers */
unsigned int ar_rgrplvb:1; /* use lvbs for rgrp info */
+ unsigned int ar_loccookie:1; /* use location based readdir
+ cookies */
int ar_commit; /* Commit interval */
int ar_statfs_quantum; /* The fast statfs interval */
int ar_quota_quantum; /* The quota interval */
@@ -689,6 +691,7 @@ struct gfs2_sbd {
u64 sd_heightsize[GFS2_MAX_META_HEIGHT + 1];
u32 sd_max_jheight; /* Max height of journaled file's meta tree */
u64 sd_jheightsize[GFS2_MAX_META_HEIGHT + 1];
+ u32 sd_max_dents_per_leaf; /* Max number of dirents in a leaf block */
struct gfs2_args sd_args; /* Mount arguments */
struct gfs2_tune sd_tune; /* Filesystem tuning structure */
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index 1f9de173c4a0..7aacdf2bafd1 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -352,6 +352,9 @@ static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent)
sdp->sd_jheightsize[x] = ~0;
gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT);
+ sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize -
+ sizeof(struct gfs2_leaf)) /
+ GFS2_MIN_DIRENT_SIZE;
return 0;
}
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 03fa155f703e..0f3d64606e93 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -83,6 +83,8 @@ enum {
Opt_nobarrier,
Opt_rgrplvb,
Opt_norgrplvb,
+ Opt_loccookie,
+ Opt_noloccookie,
Opt_error,
};
@@ -122,6 +124,8 @@ static const match_table_t tokens = {
{Opt_nobarrier, "nobarrier"},
{Opt_rgrplvb, "rgrplvb"},
{Opt_norgrplvb, "norgrplvb"},
+ {Opt_loccookie, "loccookie"},
+ {Opt_noloccookie, "noloccookie"},
{Opt_error, NULL}
};
@@ -278,6 +282,12 @@ int gfs2_mount_args(struct gfs2_args *args, char *options)
case Opt_norgrplvb:
args->ar_rgrplvb = 0;
break;
+ case Opt_loccookie:
+ args->ar_loccookie = 1;
+ break;
+ case Opt_noloccookie:
+ args->ar_loccookie = 0;
+ break;
case Opt_error:
default:
pr_warn("invalid mount option: %s\n", o);
@@ -1418,6 +1428,8 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
seq_puts(s, ",demote_interface_used");
if (args->ar_rgrplvb)
seq_puts(s, ",rgrplvb");
+ if (args->ar_loccookie)
+ seq_puts(s, ",loccookie");
return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 05:31:04 +0000