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Diffstat (limited to 'fs/gfs2/rgrp.c')
-rw-r--r--fs/gfs2/rgrp.c87
1 files changed, 70 insertions, 17 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 027f6ec5b0d..fd3fd907477 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -28,6 +28,7 @@
#include "ops_file.h"
#include "util.h"
#include "log.h"
+#include "inode.h"
#define BFITNOENT ((u32)~0)
@@ -50,6 +51,9 @@ static const char valid_change[16] = {
1, 0, 0, 0
};
+static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
+ unsigned char old_state, unsigned char new_state);
+
/**
* gfs2_setbit - Set a bit in the bitmaps
* @buffer: the buffer that holds the bitmaps
@@ -531,6 +535,7 @@ static int read_rindex_entry(struct gfs2_inode *ip,
rgd->rd_gl->gl_object = rgd;
rgd->rd_rg_vn = rgd->rd_gl->gl_vn - 1;
+ rgd->rd_flags |= GFS2_RDF_CHECK;
return error;
}
@@ -846,6 +851,37 @@ static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
}
/**
+ * try_rgrp_unlink - Look for any unlinked, allocated, but unused inodes
+ * @rgd: The rgrp
+ *
+ * Returns: The inode, if one has been found
+ */
+
+static struct inode *try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked)
+{
+ struct inode *inode;
+ u32 goal = 0;
+ u64 ino;
+
+ for(;;) {
+ goal = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED,
+ GFS2_BLKST_UNLINKED);
+ if (goal == 0)
+ return 0;
+ ino = goal + rgd->rd_data0;
+ if (ino <= *last_unlinked)
+ continue;
+ *last_unlinked = ino;
+ inode = gfs2_inode_lookup(rgd->rd_sbd->sd_vfs, ino, DT_UNKNOWN);
+ if (!IS_ERR(inode))
+ return inode;
+ }
+
+ rgd->rd_flags &= ~GFS2_RDF_CHECK;
+ return NULL;
+}
+
+/**
* recent_rgrp_first - get first RG from "recent" list
* @sdp: The GFS2 superblock
* @rglast: address of the rgrp used last
@@ -1006,8 +1042,9 @@ static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
* Returns: errno
*/
-static int get_local_rgrp(struct gfs2_inode *ip)
+static struct inode *get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
{
+ struct inode *inode = NULL;
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrpd *rgd, *begin = NULL;
struct gfs2_alloc *al = &ip->i_alloc;
@@ -1027,7 +1064,11 @@ static int get_local_rgrp(struct gfs2_inode *ip)
case 0:
if (try_rgrp_fit(rgd, al))
goto out;
+ if (rgd->rd_flags & GFS2_RDF_CHECK)
+ inode = try_rgrp_unlink(rgd, last_unlinked);
gfs2_glock_dq_uninit(&al->al_rgd_gh);
+ if (inode)
+ return inode;
rgd = recent_rgrp_next(rgd, 1);
break;
@@ -1036,7 +1077,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
break;
default:
- return error;
+ return ERR_PTR(error);
}
}
@@ -1051,7 +1092,11 @@ static int get_local_rgrp(struct gfs2_inode *ip)
case 0:
if (try_rgrp_fit(rgd, al))
goto out;
+ if (rgd->rd_flags & GFS2_RDF_CHECK)
+ inode = try_rgrp_unlink(rgd, last_unlinked);
gfs2_glock_dq_uninit(&al->al_rgd_gh);
+ if (inode)
+ return inode;
break;
case GLR_TRYFAILED:
@@ -1059,7 +1104,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
break;
default:
- return error;
+ return ERR_PTR(error);
}
rgd = gfs2_rgrpd_get_next(rgd);
@@ -1068,7 +1113,7 @@ static int get_local_rgrp(struct gfs2_inode *ip)
if (rgd == begin) {
if (++loops >= 3)
- return -ENOSPC;
+ return ERR_PTR(-ENOSPC);
if (!skipped)
loops++;
flags = 0;
@@ -1088,7 +1133,7 @@ out:
forward_rgrp_set(sdp, rgd);
}
- return 0;
+ return NULL;
}
/**
@@ -1102,11 +1147,14 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
{
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al = &ip->i_alloc;
+ struct inode *inode;
int error = 0;
+ u64 last_unlinked = 0;
if (gfs2_assert_warn(sdp, al->al_requested))
return -EINVAL;
+try_again:
/* We need to hold the rindex unless the inode we're using is
the rindex itself, in which case it's already held. */
if (ip != GFS2_I(sdp->sd_rindex))
@@ -1117,11 +1165,15 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
if (error)
return error;
- error = get_local_rgrp(ip);
- if (error) {
+ inode = get_local_rgrp(ip, &last_unlinked);
+ if (inode) {
if (ip != GFS2_I(sdp->sd_rindex))
gfs2_glock_dq_uninit(&al->al_ri_gh);
- return error;
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+ iput(inode);
+ gfs2_log_flush(sdp, NULL);
+ goto try_again;
}
al->al_file = file;
@@ -1209,7 +1261,7 @@ unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
*/
static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
- unsigned char old_state, unsigned char new_state)
+ unsigned char old_state, unsigned char new_state)
{
struct gfs2_bitmap *bi = NULL;
u32 length = rgd->rd_length;
@@ -1250,17 +1302,18 @@ static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
goal = 0;
}
- if (gfs2_assert_withdraw(rgd->rd_sbd, x <= length))
- blk = 0;
+ if (old_state != new_state) {
+ gfs2_assert_withdraw(rgd->rd_sbd, blk != BFITNOENT);
- gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
- gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
- bi->bi_len, blk, new_state);
- if (bi->bi_clone)
- gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
+ gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
+ gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
bi->bi_len, blk, new_state);
+ if (bi->bi_clone)
+ gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
+ bi->bi_len, blk, new_state);
+ }
- return bi->bi_start * GFS2_NBBY + blk;
+ return (blk == BFITNOENT) ? 0 : (bi->bi_start * GFS2_NBBY) + blk;
}
/**
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 23:48:03 +0000