Commit 620751a2 authored by Linus Torvalds's avatar Linus Torvalds
parents f187a451 044b9414
...@@ -138,10 +138,8 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, ...@@ -138,10 +138,8 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb,
struct gfs2_inum_host *inum) struct gfs2_inum_host *inum)
{ {
struct gfs2_sbd *sdp = sb->s_fs_info; struct gfs2_sbd *sdp = sb->s_fs_info;
struct gfs2_holder i_gh;
struct inode *inode; struct inode *inode;
struct dentry *dentry; struct dentry *dentry;
int error;
inode = gfs2_ilookup(sb, inum->no_addr); inode = gfs2_ilookup(sb, inum->no_addr);
if (inode) { if (inode) {
...@@ -152,52 +150,16 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb, ...@@ -152,52 +150,16 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb,
goto out_inode; goto out_inode;
} }
error = gfs2_glock_nq_num(sdp, inum->no_addr, &gfs2_inode_glops, inode = gfs2_lookup_by_inum(sdp, inum->no_addr, &inum->no_formal_ino,
LM_ST_SHARED, LM_FLAG_ANY, &i_gh); GFS2_BLKST_DINODE);
if (error) if (IS_ERR(inode))
return ERR_PTR(error); return ERR_CAST(inode);
error = gfs2_check_blk_type(sdp, inum->no_addr, GFS2_BLKST_DINODE);
if (error)
goto fail;
inode = gfs2_inode_lookup(sb, DT_UNKNOWN, inum->no_addr, 0);
if (IS_ERR(inode)) {
error = PTR_ERR(inode);
goto fail;
}
error = gfs2_inode_refresh(GFS2_I(inode));
if (error) {
iput(inode);
goto fail;
}
/* Pick up the works we bypass in gfs2_inode_lookup */
if (inode->i_state & I_NEW)
gfs2_set_iop(inode);
if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
iput(inode);
goto fail;
}
error = -EIO;
if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM) {
iput(inode);
goto fail;
}
gfs2_glock_dq_uninit(&i_gh);
out_inode: out_inode:
dentry = d_obtain_alias(inode); dentry = d_obtain_alias(inode);
if (!IS_ERR(dentry)) if (!IS_ERR(dentry))
dentry->d_op = &gfs2_dops; dentry->d_op = &gfs2_dops;
return dentry; return dentry;
fail:
gfs2_glock_dq_uninit(&i_gh);
return ERR_PTR(error);
} }
static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid, static struct dentry *gfs2_fh_to_dentry(struct super_block *sb, struct fid *fid,
......
...@@ -686,21 +686,20 @@ static void delete_work_func(struct work_struct *work) ...@@ -686,21 +686,20 @@ static void delete_work_func(struct work_struct *work)
{ {
struct gfs2_glock *gl = container_of(work, struct gfs2_glock, gl_delete); struct gfs2_glock *gl = container_of(work, struct gfs2_glock, gl_delete);
struct gfs2_sbd *sdp = gl->gl_sbd; struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_inode *ip = NULL; struct gfs2_inode *ip;
struct inode *inode; struct inode *inode;
u64 no_addr = 0; u64 no_addr = gl->gl_name.ln_number;
ip = gl->gl_object;
/* Note: Unsafe to dereference ip as we don't hold right refs/locks */
spin_lock(&gl->gl_spin);
ip = (struct gfs2_inode *)gl->gl_object;
if (ip) if (ip)
no_addr = ip->i_no_addr;
spin_unlock(&gl->gl_spin);
if (ip) {
inode = gfs2_ilookup(sdp->sd_vfs, no_addr); inode = gfs2_ilookup(sdp->sd_vfs, no_addr);
if (inode) { else
d_prune_aliases(inode); inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED);
iput(inode); if (inode && !IS_ERR(inode)) {
} d_prune_aliases(inode);
iput(inode);
} }
gfs2_glock_put(gl); gfs2_glock_put(gl);
} }
......
...@@ -73,49 +73,6 @@ static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) ...@@ -73,49 +73,6 @@ static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
} }
struct gfs2_skip_data {
u64 no_addr;
int skipped;
};
static int iget_skip_test(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_skip_data *data = opaque;
if (ip->i_no_addr == data->no_addr) {
if (inode->i_state & (I_FREEING|I_WILL_FREE)){
data->skipped = 1;
return 0;
}
return 1;
}
return 0;
}
static int iget_skip_set(struct inode *inode, void *opaque)
{
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_skip_data *data = opaque;
if (data->skipped)
return 1;
inode->i_ino = (unsigned long)(data->no_addr);
ip->i_no_addr = data->no_addr;
return 0;
}
static struct inode *gfs2_iget_skip(struct super_block *sb,
u64 no_addr)
{
struct gfs2_skip_data data;
unsigned long hash = (unsigned long)no_addr;
data.no_addr = no_addr;
data.skipped = 0;
return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
}
/** /**
* GFS2 lookup code fills in vfs inode contents based on info obtained * GFS2 lookup code fills in vfs inode contents based on info obtained
* from directory entry inside gfs2_inode_lookup(). This has caused issues * from directory entry inside gfs2_inode_lookup(). This has caused issues
...@@ -243,93 +200,54 @@ struct inode *gfs2_inode_lookup(struct super_block *sb, ...@@ -243,93 +200,54 @@ struct inode *gfs2_inode_lookup(struct super_block *sb,
return ERR_PTR(error); return ERR_PTR(error);
} }
/** struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
* gfs2_process_unlinked_inode - Lookup an unlinked inode for reclamation u64 *no_formal_ino, unsigned int blktype)
* and try to reclaim it by doing iput.
*
* This function assumes no rgrp locks are currently held.
*
* @sb: The super block
* no_addr: The inode number
*
*/
void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr)
{ {
struct gfs2_sbd *sdp; struct super_block *sb = sdp->sd_vfs;
struct gfs2_inode *ip; struct gfs2_holder i_gh;
struct gfs2_glock *io_gl = NULL;
int error;
struct gfs2_holder gh;
struct inode *inode; struct inode *inode;
int error;
inode = gfs2_iget_skip(sb, no_addr); error = gfs2_glock_nq_num(sdp, no_addr, &gfs2_inode_glops,
LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
if (!inode) if (error)
return; return ERR_PTR(error);
/* If it's not a new inode, someone's using it, so leave it alone. */
if (!(inode->i_state & I_NEW)) {
iput(inode);
return;
}
ip = GFS2_I(inode);
sdp = GFS2_SB(inode);
ip->i_no_formal_ino = -1;
error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); error = gfs2_check_blk_type(sdp, no_addr, blktype);
if (unlikely(error)) if (error)
goto fail; goto fail;
ip->i_gl->gl_object = ip;
error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0);
if (unlikely(error)) if (IS_ERR(inode))
goto fail_put; goto fail;
set_bit(GIF_INVALID, &ip->i_flags);
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, LM_FLAG_TRY | GL_EXACT,
&ip->i_iopen_gh);
if (unlikely(error))
goto fail_iopen;
ip->i_iopen_gh.gh_gl->gl_object = ip; error = gfs2_inode_refresh(GFS2_I(inode));
gfs2_glock_put(io_gl); if (error)
io_gl = NULL; goto fail_iput;
inode->i_mode = DT2IF(DT_UNKNOWN); /* Pick up the works we bypass in gfs2_inode_lookup */
if (inode->i_state & I_NEW)
gfs2_set_iop(inode);
/* /* Two extra checks for NFS only */
* We must read the inode in order to work out its type in if (no_formal_ino) {
* this case. Note that this doesn't happen often as we normally error = -ESTALE;
* know the type beforehand. This code path only occurs during if (GFS2_I(inode)->i_no_formal_ino != *no_formal_ino)
* unlinked inode recovery (where it is safe to do this glock, goto fail_iput;
* which is not true in the general case).
*/
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY,
&gh);
if (unlikely(error))
goto fail_glock;
/* Inode is now uptodate */ error = -EIO;
gfs2_glock_dq_uninit(&gh); if (GFS2_I(inode)->i_diskflags & GFS2_DIF_SYSTEM)
gfs2_set_iop(inode); goto fail_iput;
/* The iput will cause it to be deleted. */ error = 0;
iput(inode); }
return;
fail_glock:
gfs2_glock_dq(&ip->i_iopen_gh);
fail_iopen:
if (io_gl)
gfs2_glock_put(io_gl);
fail_put:
ip->i_gl->gl_object = NULL;
gfs2_glock_put(ip->i_gl);
fail: fail:
iget_failed(inode); gfs2_glock_dq_uninit(&i_gh);
return; return error ? ERR_PTR(error) : inode;
fail_iput:
iput(inode);
goto fail;
} }
static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
......
...@@ -99,7 +99,9 @@ static inline int gfs2_check_internal_file_size(struct inode *inode, ...@@ -99,7 +99,9 @@ static inline int gfs2_check_internal_file_size(struct inode *inode,
extern void gfs2_set_iop(struct inode *inode); extern void gfs2_set_iop(struct inode *inode);
extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type, extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
u64 no_addr, u64 no_formal_ino); u64 no_addr, u64 no_formal_ino);
extern void gfs2_process_unlinked_inode(struct super_block *sb, u64 no_addr); extern struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
u64 *no_formal_ino,
unsigned int blktype);
extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr); extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
extern int gfs2_inode_refresh(struct gfs2_inode *ip); extern int gfs2_inode_refresh(struct gfs2_inode *ip);
......
...@@ -963,17 +963,18 @@ static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al) ...@@ -963,17 +963,18 @@ static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
* The inode, if one has been found, in inode. * The inode, if one has been found, in inode.
*/ */
static u64 try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, static void try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, u64 skip)
u64 skip)
{ {
u32 goal = 0, block; u32 goal = 0, block;
u64 no_addr; u64 no_addr;
struct gfs2_sbd *sdp = rgd->rd_sbd; struct gfs2_sbd *sdp = rgd->rd_sbd;
unsigned int n; unsigned int n;
struct gfs2_glock *gl;
struct gfs2_inode *ip;
int error;
int found = 0;
for(;;) { while (goal < rgd->rd_data) {
if (goal >= rgd->rd_data)
break;
down_write(&sdp->sd_log_flush_lock); down_write(&sdp->sd_log_flush_lock);
n = 1; n = 1;
block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED, block = rgblk_search(rgd, goal, GFS2_BLKST_UNLINKED,
...@@ -990,11 +991,32 @@ static u64 try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked, ...@@ -990,11 +991,32 @@ static u64 try_rgrp_unlink(struct gfs2_rgrpd *rgd, u64 *last_unlinked,
if (no_addr == skip) if (no_addr == skip)
continue; continue;
*last_unlinked = no_addr; *last_unlinked = no_addr;
return no_addr;
error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &gl);
if (error)
continue;
/* If the inode is already in cache, we can ignore it here
* because the existing inode disposal code will deal with
* it when all refs have gone away. Accessing gl_object like
* this is not safe in general. Here it is ok because we do
* not dereference the pointer, and we only need an approx
* answer to whether it is NULL or not.
*/
ip = gl->gl_object;
if (ip || queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
gfs2_glock_put(gl);
else
found++;
/* Limit reclaim to sensible number of tasks */
if (found > 2*NR_CPUS)
return;
} }
rgd->rd_flags &= ~GFS2_RDF_CHECK; rgd->rd_flags &= ~GFS2_RDF_CHECK;
return 0; return;
} }
/** /**
...@@ -1075,11 +1097,9 @@ static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd) ...@@ -1075,11 +1097,9 @@ static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
* Try to acquire rgrp in way which avoids contending with others. * Try to acquire rgrp in way which avoids contending with others.
* *
* Returns: errno * Returns: errno
* unlinked: the block address of an unlinked block to be reclaimed
*/ */
static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, static int get_local_rgrp(struct gfs2_inode *ip, u64 *last_unlinked)
u64 *last_unlinked)
{ {
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_rgrpd *rgd, *begin = NULL; struct gfs2_rgrpd *rgd, *begin = NULL;
...@@ -1089,7 +1109,6 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, ...@@ -1089,7 +1109,6 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked,
int loops = 0; int loops = 0;
int error, rg_locked; int error, rg_locked;
*unlinked = 0;
rgd = gfs2_blk2rgrpd(sdp, ip->i_goal); rgd = gfs2_blk2rgrpd(sdp, ip->i_goal);
while (rgd) { while (rgd) {
...@@ -1106,17 +1125,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, ...@@ -1106,17 +1125,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked,
case 0: case 0:
if (try_rgrp_fit(rgd, al)) if (try_rgrp_fit(rgd, al))
goto out; goto out;
/* If the rg came in already locked, there's no if (rgd->rd_flags & GFS2_RDF_CHECK)
way we can recover from a failed try_rgrp_unlink try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr);
because that would require an iput which can only
happen after the rgrp is unlocked. */
if (!rg_locked && rgd->rd_flags & GFS2_RDF_CHECK)
*unlinked = try_rgrp_unlink(rgd, last_unlinked,
ip->i_no_addr);
if (!rg_locked) if (!rg_locked)
gfs2_glock_dq_uninit(&al->al_rgd_gh); gfs2_glock_dq_uninit(&al->al_rgd_gh);
if (*unlinked)
return -EAGAIN;
/* fall through */ /* fall through */
case GLR_TRYFAILED: case GLR_TRYFAILED:
rgd = recent_rgrp_next(rgd); rgd = recent_rgrp_next(rgd);
...@@ -1145,13 +1157,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked, ...@@ -1145,13 +1157,10 @@ static int get_local_rgrp(struct gfs2_inode *ip, u64 *unlinked,
case 0: case 0:
if (try_rgrp_fit(rgd, al)) if (try_rgrp_fit(rgd, al))
goto out; goto out;
if (!rg_locked && rgd->rd_flags & GFS2_RDF_CHECK) if (rgd->rd_flags & GFS2_RDF_CHECK)
*unlinked = try_rgrp_unlink(rgd, last_unlinked, try_rgrp_unlink(rgd, last_unlinked, ip->i_no_addr);
ip->i_no_addr);
if (!rg_locked) if (!rg_locked)
gfs2_glock_dq_uninit(&al->al_rgd_gh); gfs2_glock_dq_uninit(&al->al_rgd_gh);
if (*unlinked)
return -EAGAIN;
break; break;
case GLR_TRYFAILED: case GLR_TRYFAILED:
...@@ -1204,12 +1213,12 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex, ...@@ -1204,12 +1213,12 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex,
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
struct gfs2_alloc *al = ip->i_alloc; struct gfs2_alloc *al = ip->i_alloc;
int error = 0; int error = 0;
u64 last_unlinked = NO_BLOCK, unlinked; u64 last_unlinked = NO_BLOCK;
int tries = 0;
if (gfs2_assert_warn(sdp, al->al_requested)) if (gfs2_assert_warn(sdp, al->al_requested))
return -EINVAL; return -EINVAL;
try_again:
if (hold_rindex) { if (hold_rindex) {
/* We need to hold the rindex unless the inode we're using is /* We need to hold the rindex unless the inode we're using is
the rindex itself, in which case it's already held. */ the rindex itself, in which case it's already held. */
...@@ -1218,31 +1227,23 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex, ...@@ -1218,31 +1227,23 @@ int gfs2_inplace_reserve_i(struct gfs2_inode *ip, int hold_rindex,
else if (!sdp->sd_rgrps) /* We may not have the rindex read else if (!sdp->sd_rgrps) /* We may not have the rindex read
in, so: */ in, so: */
error = gfs2_ri_update_special(ip); error = gfs2_ri_update_special(ip);
if (error)
return error;
} }
if (error) do {
return error; error = get_local_rgrp(ip, &last_unlinked);
/* If there is no space, flushing the log may release some */
if (error)
gfs2_log_flush(sdp, NULL);
} while (error && tries++ < 3);
/* Find an rgrp suitable for allocation. If it encounters any unlinked
dinodes along the way, error will equal -EAGAIN and unlinked will
contains it block address. We then need to look up that inode and
try to free it, and try the allocation again. */
error = get_local_rgrp(ip, &unlinked, &last_unlinked);
if (error) { if (error) {
if (hold_rindex && ip != GFS2_I(sdp->sd_rindex)) if (hold_rindex && ip != GFS2_I(sdp->sd_rindex))
gfs2_glock_dq_uninit(&al->al_ri_gh); gfs2_glock_dq_uninit(&al->al_ri_gh);
if (error != -EAGAIN) return error;
return error;
gfs2_process_unlinked_inode(ip->i_inode.i_sb, unlinked);
/* regardless of whether or not gfs2_process_unlinked_inode
was successful, we don't want to repeat it again. */
last_unlinked = unlinked;
gfs2_log_flush(sdp, NULL);
error = 0;
goto try_again;
} }
/* no error, so we have the rgrp set in the inode's allocation. */ /* no error, so we have the rgrp set in the inode's allocation. */
al->al_file = file; al->al_file = file;
al->al_line = line; al->al_line = line;
......
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