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authorLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 16:51:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-17 16:51:32 -0700
commit1ca80a0a3e37d847f3cd6120ca5eb35b39a9a152 (patch)
tree142862af82d881d1b54a949f3887f692c18bbbc9 /fs/gfs2
parentd77bed0d4c61cb0258851367a36b358dbeb7abcc (diff)
parent73b462d2808d7cbca4d7886cf6aaed850640e6cd (diff)
downloadop-kernel-dev-1ca80a0a3e37d847f3cd6120ca5eb35b39a9a152.zip
op-kernel-dev-1ca80a0a3e37d847f3cd6120ca5eb35b39a9a152.tar.gz
Merge tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull GFS2 updates from Bob Peterson: "We only have six patches ready for this merge window: - Arnd Bergmann contributed a patch that fixes an uninitialized variable warning. - The second patch avoids a kernel panic due to referencing an iopen glock that may not be held, in an error path. - The third patch fixes a rounding error that caused xfs_tests direct IO write "fsx" tests to fail on GFS2. - The fourth patch tidies up the code path when glocks are being reused to recreate a dinode that was recently deleted. - The fifth reverts an ages-old patch that should no longer be needed, and which interfered with the transition of dinodes from unlinked to free. - And lastly, a patch to eliminate a function parameter that's not needed" * tag 'gfs2-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: GFS2: Eliminate parameter non_block on gfs2_inode_lookup GFS2: Don't filter out I_FREEING inodes anymore GFS2: Prevent delete work from occurring on glocks used for create GFS2: Fix direct IO write rounding error gfs2: avoid uninitialized variable warning GFS2: Check if iopen is held when deleting inode
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/aops.c2
-rw-r--r--fs/gfs2/dir.c6
-rw-r--r--fs/gfs2/export.c2
-rw-r--r--fs/gfs2/glock.c10
-rw-r--r--fs/gfs2/incore.h1
-rw-r--r--fs/gfs2/inode.c71
-rw-r--r--fs/gfs2/inode.h5
-rw-r--r--fs/gfs2/ops_fstype.c2
-rw-r--r--fs/gfs2/super.c26
9 files changed, 46 insertions, 79 deletions
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 93f0746..aa016e4 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1082,7 +1082,7 @@ static ssize_t gfs2_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
* the first place, mapping->nr_pages will always be zero.
*/
if (mapping->nrpages) {
- loff_t lstart = offset & (PAGE_CACHE_SIZE - 1);
+ loff_t lstart = offset & ~(PAGE_CACHE_SIZE - 1);
loff_t len = iov_iter_count(iter);
loff_t end = PAGE_ALIGN(offset + len) - 1;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index 6a92592..4a01f30 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -798,7 +798,7 @@ static int get_first_leaf(struct gfs2_inode *dip, u32 index,
int error;
error = get_leaf_nr(dip, index, &leaf_no);
- if (!error)
+ if (!IS_ERR_VALUE(error))
error = get_leaf(dip, leaf_no, bh_out);
return error;
@@ -1014,7 +1014,7 @@ static int dir_split_leaf(struct inode *inode, const struct qstr *name)
index = name->hash >> (32 - dip->i_depth);
error = get_leaf_nr(dip, index, &leaf_no);
- if (error)
+ if (IS_ERR_VALUE(error))
return error;
/* Get the old leaf block */
@@ -1660,7 +1660,7 @@ struct inode *gfs2_dir_search(struct inode *dir, const struct qstr *name,
brelse(bh);
if (fail_on_exist)
return ERR_PTR(-EEXIST);
- inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino, 0);
+ inode = gfs2_inode_lookup(dir->i_sb, dtype, addr, formal_ino);
if (!IS_ERR(inode))
GFS2_I(inode)->i_rahead = rahead;
return inode;
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index 5d15e94..d5bda85 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -137,7 +137,7 @@ static struct dentry *gfs2_get_dentry(struct super_block *sb,
struct gfs2_sbd *sdp = sb->s_fs_info;
struct inode *inode;
- inode = gfs2_ilookup(sb, inum->no_addr, 0);
+ inode = gfs2_ilookup(sb, inum->no_addr);
if (inode) {
if (GFS2_I(inode)->i_no_formal_ino != inum->no_formal_ino) {
iput(inode);
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index a4ff7b5..6539131 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -572,17 +572,24 @@ static void delete_work_func(struct work_struct *work)
struct inode *inode;
u64 no_addr = gl->gl_name.ln_number;
+ /* If someone's using this glock to create a new dinode, the block must
+ have been freed by another node, then re-used, in which case our
+ iopen callback is too late after the fact. Ignore it. */
+ if (test_bit(GLF_INODE_CREATING, &gl->gl_flags))
+ goto out;
+
ip = gl->gl_object;
/* Note: Unsafe to dereference ip as we don't hold right refs/locks */
if (ip)
- inode = gfs2_ilookup(sdp->sd_vfs, no_addr, 1);
+ inode = gfs2_ilookup(sdp->sd_vfs, no_addr);
else
inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED);
if (inode && !IS_ERR(inode)) {
d_prune_aliases(inode);
iput(inode);
}
+out:
gfs2_glock_put(gl);
}
@@ -1015,6 +1022,7 @@ void gfs2_glock_dq(struct gfs2_holder *gh)
handle_callback(gl, LM_ST_UNLOCKED, 0, false);
list_del_init(&gh->gh_list);
+ clear_bit(HIF_HOLDER, &gh->gh_iflags);
if (find_first_holder(gl) == NULL) {
if (glops->go_unlock) {
GLOCK_BUG_ON(gl, test_and_set_bit(GLF_LOCK, &gl->gl_flags));
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index 845fb09..a6a3389 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -328,6 +328,7 @@ enum {
GLF_LRU = 13,
GLF_OBJECT = 14, /* Used only for tracing */
GLF_BLOCKING = 15,
+ GLF_INODE_CREATING = 16, /* Inode creation occurring */
};
struct gfs2_glock {
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 352f958..bb30f9a 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -37,61 +37,9 @@
#include "super.h"
#include "glops.h"
-struct gfs2_skip_data {
- u64 no_addr;
- int skipped;
- int non_block;
-};
-
-static int iget_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 (data->non_block &&
- inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)) {
- data->skipped = 1;
- return 0;
- }
- return 1;
- }
- return 0;
-}
-
-static int iget_set(struct inode *inode, void *opaque)
-{
- struct gfs2_inode *ip = GFS2_I(inode);
- struct gfs2_skip_data *data = opaque;
-
- if (data->skipped)
- return -ENOENT;
- inode->i_ino = (unsigned long)(data->no_addr);
- ip->i_no_addr = data->no_addr;
- return 0;
-}
-
-struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr, int non_block)
+struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
{
- unsigned long hash = (unsigned long)no_addr;
- struct gfs2_skip_data data;
-
- data.no_addr = no_addr;
- data.skipped = 0;
- data.non_block = non_block;
- return ilookup5(sb, hash, iget_test, &data);
-}
-
-static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr,
- int non_block)
-{
- struct gfs2_skip_data data;
- unsigned long hash = (unsigned long)no_addr;
-
- data.no_addr = no_addr;
- data.skipped = 0;
- data.non_block = non_block;
- return iget5_locked(sb, hash, iget_test, iget_set, &data);
+ return ilookup(sb, (unsigned long)no_addr);
}
/**
@@ -132,21 +80,21 @@ static void gfs2_set_iop(struct inode *inode)
* @sb: The super block
* @no_addr: The inode number
* @type: The type of the inode
- * non_block: Can we block on inodes that are being freed?
*
* Returns: A VFS inode, or an error
*/
struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned int type,
- u64 no_addr, u64 no_formal_ino, int non_block)
+ u64 no_addr, u64 no_formal_ino)
{
struct inode *inode;
struct gfs2_inode *ip;
struct gfs2_glock *io_gl = NULL;
int error;
- inode = gfs2_iget(sb, no_addr, non_block);
+ inode = iget_locked(sb, (unsigned long)no_addr);
ip = GFS2_I(inode);
+ ip->i_no_addr = no_addr;
if (!inode)
return ERR_PTR(-ENOMEM);
@@ -221,7 +169,7 @@ struct inode *gfs2_lookup_by_inum(struct gfs2_sbd *sdp, u64 no_addr,
if (error)
goto fail;
- inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0, 1);
+ inode = gfs2_inode_lookup(sb, DT_UNKNOWN, no_addr, 0);
if (IS_ERR(inode))
goto fail;
@@ -592,7 +540,7 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
struct inode *inode = NULL;
struct gfs2_inode *dip = GFS2_I(dir), *ip;
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
- struct gfs2_glock *io_gl;
+ struct gfs2_glock *io_gl = NULL;
int error, free_vfs_inode = 1;
u32 aflags = 0;
unsigned blocks = 1;
@@ -729,6 +677,8 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
if (error)
goto fail_gunlock2;
+ BUG_ON(test_and_set_bit(GLF_INODE_CREATING, &io_gl->gl_flags));
+
error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
if (error)
goto fail_gunlock2;
@@ -771,12 +721,15 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
}
gfs2_glock_dq_uninit(ghs);
gfs2_glock_dq_uninit(ghs + 1);
+ clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
return error;
fail_gunlock3:
gfs2_glock_dq_uninit(&ip->i_iopen_gh);
gfs2_glock_put(io_gl);
fail_gunlock2:
+ if (io_gl)
+ clear_bit(GLF_INODE_CREATING, &io_gl->gl_flags);
gfs2_glock_dq_uninit(ghs + 1);
fail_free_inode:
if (ip->i_gl)
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index ba4d949..e1af0d4 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -94,12 +94,11 @@ err:
}
extern struct inode *gfs2_inode_lookup(struct super_block *sb, unsigned type,
- u64 no_addr, u64 no_formal_ino,
- int non_block);
+ u64 no_addr, u64 no_formal_ino);
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, int nonblock);
+extern struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr);
extern int gfs2_inode_refresh(struct gfs2_inode *ip);
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index dbed9e2..49b0bff 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -454,7 +454,7 @@ static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr,
struct dentry *dentry;
struct inode *inode;
- inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0);
+ inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0);
if (IS_ERR(inode)) {
fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode));
return PTR_ERR(inode);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 8f960a5..f8a0cd8 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1551,12 +1551,16 @@ static void gfs2_evict_inode(struct inode *inode)
goto out_truncate;
}
- ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
- gfs2_glock_dq_wait(&ip->i_iopen_gh);
- gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh);
- error = gfs2_glock_nq(&ip->i_iopen_gh);
- if (error)
- goto out_truncate;
+ if (ip->i_iopen_gh.gh_gl &&
+ test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
+ ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
+ gfs2_glock_dq_wait(&ip->i_iopen_gh);
+ gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE,
+ &ip->i_iopen_gh);
+ error = gfs2_glock_nq(&ip->i_iopen_gh);
+ if (error)
+ goto out_truncate;
+ }
/* Case 1 starts here */
@@ -1606,11 +1610,13 @@ out_unlock:
if (gfs2_rs_active(&ip->i_res))
gfs2_rs_deltree(&ip->i_res);
- if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
- ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
- gfs2_glock_dq_wait(&ip->i_iopen_gh);
+ if (ip->i_iopen_gh.gh_gl) {
+ if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
+ ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
+ gfs2_glock_dq_wait(&ip->i_iopen_gh);
+ }
+ gfs2_holder_uninit(&ip->i_iopen_gh);
}
- gfs2_holder_uninit(&ip->i_iopen_gh);
gfs2_glock_dq_uninit(&gh);
if (error && error != GLR_TRYFAILED && error != -EROFS)
fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
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