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-rw-r--r--fs/ceph/file.c6
-rw-r--r--fs/overlayfs/Kconfig1
-rw-r--r--fs/overlayfs/copy_up.c24
-rw-r--r--fs/overlayfs/dir.c61
-rw-r--r--fs/overlayfs/inode.c12
-rw-r--r--fs/overlayfs/namei.c16
-rw-r--r--fs/overlayfs/overlayfs.h16
-rw-r--r--fs/overlayfs/ovl_entry.h2
-rw-r--r--fs/overlayfs/super.c18
-rw-r--r--fs/overlayfs/util.c72
-rw-r--r--fs/proc/base.c2
-rw-r--r--fs/xfs/libxfs/xfs_bmap.c9
-rw-r--r--fs/xfs/libxfs/xfs_btree.c2
-rw-r--r--fs/xfs/libxfs/xfs_refcount.c43
-rw-r--r--fs/xfs/xfs_bmap_util.c10
-rw-r--r--fs/xfs/xfs_file.c71
-rw-r--r--fs/xfs/xfs_fsmap.c5
17 files changed, 250 insertions, 120 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 3fdde0b283c9..29308a80d66f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1671,8 +1671,12 @@ static long ceph_fallocate(struct file *file, int mode,
}
size = i_size_read(inode);
- if (!(mode & FALLOC_FL_KEEP_SIZE))
+ if (!(mode & FALLOC_FL_KEEP_SIZE)) {
endoff = offset + length;
+ ret = inode_newsize_ok(inode, endoff);
+ if (ret)
+ goto unlock;
+ }
if (fi->fmode & CEPH_FILE_MODE_LAZY)
want = CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_LAZYIO;
diff --git a/fs/overlayfs/Kconfig b/fs/overlayfs/Kconfig
index 0daac5112f7a..c0c9683934b7 100644
--- a/fs/overlayfs/Kconfig
+++ b/fs/overlayfs/Kconfig
@@ -1,5 +1,6 @@
config OVERLAY_FS
tristate "Overlay filesystem support"
+ select EXPORTFS
help
An overlay filesystem combines two filesystems - an 'upper' filesystem
and a 'lower' filesystem. When a name exists in both filesystems, the
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 9008ab9fbd2e..7a44533f4bbf 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -300,7 +300,11 @@ static int ovl_set_origin(struct dentry *dentry, struct dentry *lower,
return PTR_ERR(fh);
}
- err = ovl_do_setxattr(upper, OVL_XATTR_ORIGIN, fh, fh ? fh->len : 0, 0);
+ /*
+ * Do not fail when upper doesn't support xattrs.
+ */
+ err = ovl_check_setxattr(dentry, upper, OVL_XATTR_ORIGIN, fh,
+ fh ? fh->len : 0, 0);
kfree(fh);
return err;
@@ -342,13 +346,14 @@ static int ovl_copy_up_locked(struct dentry *workdir, struct dentry *upperdir,
if (tmpfile)
temp = ovl_do_tmpfile(upperdir, stat->mode);
else
- temp = ovl_lookup_temp(workdir, dentry);
- err = PTR_ERR(temp);
- if (IS_ERR(temp))
- goto out1;
-
+ temp = ovl_lookup_temp(workdir);
err = 0;
- if (!tmpfile)
+ if (IS_ERR(temp)) {
+ err = PTR_ERR(temp);
+ temp = NULL;
+ }
+
+ if (!err && !tmpfile)
err = ovl_create_real(wdir, temp, &cattr, NULL, true);
if (new_creds) {
@@ -454,6 +459,11 @@ static int ovl_copy_up_one(struct dentry *parent, struct dentry *dentry,
ovl_path_upper(parent, &parentpath);
upperdir = parentpath.dentry;
+ /* Mark parent "impure" because it may now contain non-pure upper */
+ err = ovl_set_impure(parent, upperdir);
+ if (err)
+ return err;
+
err = vfs_getattr(&parentpath, &pstat,
STATX_ATIME | STATX_MTIME, AT_STATX_SYNC_AS_STAT);
if (err)
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 723b98b90698..a63a71656e9b 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -41,7 +41,7 @@ void ovl_cleanup(struct inode *wdir, struct dentry *wdentry)
}
}
-struct dentry *ovl_lookup_temp(struct dentry *workdir, struct dentry *dentry)
+struct dentry *ovl_lookup_temp(struct dentry *workdir)
{
struct dentry *temp;
char name[20];
@@ -68,7 +68,7 @@ static struct dentry *ovl_whiteout(struct dentry *workdir,
struct dentry *whiteout;
struct inode *wdir = workdir->d_inode;
- whiteout = ovl_lookup_temp(workdir, dentry);
+ whiteout = ovl_lookup_temp(workdir);
if (IS_ERR(whiteout))
return whiteout;
@@ -127,17 +127,28 @@ int ovl_create_real(struct inode *dir, struct dentry *newdentry,
return err;
}
-static int ovl_set_opaque(struct dentry *dentry, struct dentry *upperdentry)
+static int ovl_set_opaque_xerr(struct dentry *dentry, struct dentry *upper,
+ int xerr)
{
int err;
- err = ovl_do_setxattr(upperdentry, OVL_XATTR_OPAQUE, "y", 1, 0);
+ err = ovl_check_setxattr(dentry, upper, OVL_XATTR_OPAQUE, "y", 1, xerr);
if (!err)
ovl_dentry_set_opaque(dentry);
return err;
}
+static int ovl_set_opaque(struct dentry *dentry, struct dentry *upperdentry)
+{
+ /*
+ * Fail with -EIO when trying to create opaque dir and upper doesn't
+ * support xattrs. ovl_rename() calls ovl_set_opaque_xerr(-EXDEV) to
+ * return a specific error for noxattr case.
+ */
+ return ovl_set_opaque_xerr(dentry, upperdentry, -EIO);
+}
+
/* Common operations required to be done after creation of file on upper */
static void ovl_instantiate(struct dentry *dentry, struct inode *inode,
struct dentry *newdentry, bool hardlink)
@@ -162,6 +173,11 @@ static bool ovl_type_merge(struct dentry *dentry)
return OVL_TYPE_MERGE(ovl_path_type(dentry));
}
+static bool ovl_type_origin(struct dentry *dentry)
+{
+ return OVL_TYPE_ORIGIN(ovl_path_type(dentry));
+}
+
static int ovl_create_upper(struct dentry *dentry, struct inode *inode,
struct cattr *attr, struct dentry *hardlink)
{
@@ -250,7 +266,7 @@ static struct dentry *ovl_clear_empty(struct dentry *dentry,
if (upper->d_parent->d_inode != udir)
goto out_unlock;
- opaquedir = ovl_lookup_temp(workdir, dentry);
+ opaquedir = ovl_lookup_temp(workdir);
err = PTR_ERR(opaquedir);
if (IS_ERR(opaquedir))
goto out_unlock;
@@ -382,7 +398,7 @@ static int ovl_create_over_whiteout(struct dentry *dentry, struct inode *inode,
if (err)
goto out;
- newdentry = ovl_lookup_temp(workdir, dentry);
+ newdentry = ovl_lookup_temp(workdir);
err = PTR_ERR(newdentry);
if (IS_ERR(newdentry))
goto out_unlock;
@@ -846,18 +862,16 @@ static int ovl_set_redirect(struct dentry *dentry, bool samedir)
if (IS_ERR(redirect))
return PTR_ERR(redirect);
- err = ovl_do_setxattr(ovl_dentry_upper(dentry), OVL_XATTR_REDIRECT,
- redirect, strlen(redirect), 0);
+ err = ovl_check_setxattr(dentry, ovl_dentry_upper(dentry),
+ OVL_XATTR_REDIRECT,
+ redirect, strlen(redirect), -EXDEV);
if (!err) {
spin_lock(&dentry->d_lock);
ovl_dentry_set_redirect(dentry, redirect);
spin_unlock(&dentry->d_lock);
} else {
kfree(redirect);
- if (err == -EOPNOTSUPP)
- ovl_clear_redirect_dir(dentry->d_sb);
- else
- pr_warn_ratelimited("overlay: failed to set redirect (%i)\n", err);
+ pr_warn_ratelimited("overlay: failed to set redirect (%i)\n", err);
/* Fall back to userspace copy-up */
err = -EXDEV;
}
@@ -943,6 +957,25 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
old_upperdir = ovl_dentry_upper(old->d_parent);
new_upperdir = ovl_dentry_upper(new->d_parent);
+ if (!samedir) {
+ /*
+ * When moving a merge dir or non-dir with copy up origin into
+ * a new parent, we are marking the new parent dir "impure".
+ * When ovl_iterate() iterates an "impure" upper dir, it will
+ * lookup the origin inodes of the entries to fill d_ino.
+ */
+ if (ovl_type_origin(old)) {
+ err = ovl_set_impure(new->d_parent, new_upperdir);
+ if (err)
+ goto out_revert_creds;
+ }
+ if (!overwrite && ovl_type_origin(new)) {
+ err = ovl_set_impure(old->d_parent, old_upperdir);
+ if (err)
+ goto out_revert_creds;
+ }
+ }
+
trap = lock_rename(new_upperdir, old_upperdir);
olddentry = lookup_one_len(old->d_name.name, old_upperdir,
@@ -992,7 +1025,7 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
if (ovl_type_merge_or_lower(old))
err = ovl_set_redirect(old, samedir);
else if (!old_opaque && ovl_type_merge(new->d_parent))
- err = ovl_set_opaque(old, olddentry);
+ err = ovl_set_opaque_xerr(old, olddentry, -EXDEV);
if (err)
goto out_dput;
}
@@ -1000,7 +1033,7 @@ static int ovl_rename(struct inode *olddir, struct dentry *old,
if (ovl_type_merge_or_lower(new))
err = ovl_set_redirect(new, samedir);
else if (!new_opaque && ovl_type_merge(old->d_parent))
- err = ovl_set_opaque(new, newdentry);
+ err = ovl_set_opaque_xerr(new, newdentry, -EXDEV);
if (err)
goto out_dput;
}
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index ad9547f82da5..d613e2c41242 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -240,6 +240,16 @@ int ovl_xattr_get(struct dentry *dentry, const char *name,
return res;
}
+static bool ovl_can_list(const char *s)
+{
+ /* List all non-trusted xatts */
+ if (strncmp(s, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) != 0)
+ return true;
+
+ /* Never list trusted.overlay, list other trusted for superuser only */
+ return !ovl_is_private_xattr(s) && capable(CAP_SYS_ADMIN);
+}
+
ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
{
struct dentry *realdentry = ovl_dentry_real(dentry);
@@ -263,7 +273,7 @@ ssize_t ovl_listxattr(struct dentry *dentry, char *list, size_t size)
return -EIO;
len -= slen;
- if (ovl_is_private_xattr(s)) {
+ if (!ovl_can_list(s)) {
res -= slen;
memmove(s, s + slen, len);
} else {
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index bad0f665a635..f3136c31e72a 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -169,17 +169,7 @@ invalid:
static bool ovl_is_opaquedir(struct dentry *dentry)
{
- int res;
- char val;
-
- if (!d_is_dir(dentry))
- return false;
-
- res = vfs_getxattr(dentry, OVL_XATTR_OPAQUE, &val, 1);
- if (res == 1 && val == 'y')
- return true;
-
- return false;
+ return ovl_check_dir_xattr(dentry, OVL_XATTR_OPAQUE);
}
static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d,
@@ -351,6 +341,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
unsigned int ctr = 0;
struct inode *inode = NULL;
bool upperopaque = false;
+ bool upperimpure = false;
char *upperredirect = NULL;
struct dentry *this;
unsigned int i;
@@ -395,6 +386,8 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
poe = roe;
}
upperopaque = d.opaque;
+ if (upperdentry && d.is_dir)
+ upperimpure = ovl_is_impuredir(upperdentry);
}
if (!d.stop && poe->numlower) {
@@ -463,6 +456,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
revert_creds(old_cred);
oe->opaque = upperopaque;
+ oe->impure = upperimpure;
oe->redirect = upperredirect;
oe->__upperdentry = upperdentry;
memcpy(oe->lowerstack, stack, sizeof(struct path) * ctr);
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index caa36cb9c46d..0623cebeefff 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -24,6 +24,7 @@ enum ovl_path_type {
#define OVL_XATTR_OPAQUE OVL_XATTR_PREFIX "opaque"
#define OVL_XATTR_REDIRECT OVL_XATTR_PREFIX "redirect"
#define OVL_XATTR_ORIGIN OVL_XATTR_PREFIX "origin"
+#define OVL_XATTR_IMPURE OVL_XATTR_PREFIX "impure"
/*
* The tuple (fh,uuid) is a universal unique identifier for a copy up origin,
@@ -203,10 +204,10 @@ struct dentry *ovl_dentry_real(struct dentry *dentry);
struct ovl_dir_cache *ovl_dir_cache(struct dentry *dentry);
void ovl_set_dir_cache(struct dentry *dentry, struct ovl_dir_cache *cache);
bool ovl_dentry_is_opaque(struct dentry *dentry);
+bool ovl_dentry_is_impure(struct dentry *dentry);
bool ovl_dentry_is_whiteout(struct dentry *dentry);
void ovl_dentry_set_opaque(struct dentry *dentry);
bool ovl_redirect_dir(struct super_block *sb);
-void ovl_clear_redirect_dir(struct super_block *sb);
const char *ovl_dentry_get_redirect(struct dentry *dentry);
void ovl_dentry_set_redirect(struct dentry *dentry, const char *redirect);
void ovl_dentry_update(struct dentry *dentry, struct dentry *upperdentry);
@@ -219,6 +220,17 @@ bool ovl_is_whiteout(struct dentry *dentry);
struct file *ovl_path_open(struct path *path, int flags);
int ovl_copy_up_start(struct dentry *dentry);
void ovl_copy_up_end(struct dentry *dentry);
+bool ovl_check_dir_xattr(struct dentry *dentry, const char *name);
+int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
+ const char *name, const void *value, size_t size,
+ int xerr);
+int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry);
+
+static inline bool ovl_is_impuredir(struct dentry *dentry)
+{
+ return ovl_check_dir_xattr(dentry, OVL_XATTR_IMPURE);
+}
+
/* namei.c */
int ovl_path_next(int idx, struct dentry *dentry, struct path *path);
@@ -263,7 +275,7 @@ static inline void ovl_copyattr(struct inode *from, struct inode *to)
/* dir.c */
extern const struct inode_operations ovl_dir_inode_operations;
-struct dentry *ovl_lookup_temp(struct dentry *workdir, struct dentry *dentry);
+struct dentry *ovl_lookup_temp(struct dentry *workdir);
struct cattr {
dev_t rdev;
umode_t mode;
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index b2023ddb8532..34bc4a9f5c61 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -28,6 +28,7 @@ struct ovl_fs {
/* creds of process who forced instantiation of super block */
const struct cred *creator_cred;
bool tmpfile;
+ bool noxattr;
wait_queue_head_t copyup_wq;
/* sb common to all layers */
struct super_block *same_sb;
@@ -42,6 +43,7 @@ struct ovl_entry {
u64 version;
const char *redirect;
bool opaque;
+ bool impure;
bool copying;
};
struct rcu_head rcu;
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 9828b7de8999..4882ffb37bae 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -891,6 +891,19 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
dput(temp);
else
pr_warn("overlayfs: upper fs does not support tmpfile.\n");
+
+ /*
+ * Check if upper/work fs supports trusted.overlay.*
+ * xattr
+ */
+ err = ovl_do_setxattr(ufs->workdir, OVL_XATTR_OPAQUE,
+ "0", 1, 0);
+ if (err) {
+ ufs->noxattr = true;
+ pr_warn("overlayfs: upper fs does not support xattr.\n");
+ } else {
+ vfs_removexattr(ufs->workdir, OVL_XATTR_OPAQUE);
+ }
}
}
@@ -961,7 +974,10 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
path_put(&workpath);
kfree(lowertmp);
- oe->__upperdentry = upperpath.dentry;
+ if (upperpath.dentry) {
+ oe->__upperdentry = upperpath.dentry;
+ oe->impure = ovl_is_impuredir(upperpath.dentry);
+ }
for (i = 0; i < numlower; i++) {
oe->lowerstack[i].dentry = stack[i].dentry;
oe->lowerstack[i].mnt = ufs->lower_mnt[i];
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index cfdea47313a1..809048913889 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -175,6 +175,13 @@ bool ovl_dentry_is_opaque(struct dentry *dentry)
return oe->opaque;
}
+bool ovl_dentry_is_impure(struct dentry *dentry)
+{
+ struct ovl_entry *oe = dentry->d_fsdata;
+
+ return oe->impure;
+}
+
bool ovl_dentry_is_whiteout(struct dentry *dentry)
{
return !dentry->d_inode && ovl_dentry_is_opaque(dentry);
@@ -191,14 +198,7 @@ bool ovl_redirect_dir(struct super_block *sb)
{
struct ovl_fs *ofs = sb->s_fs_info;
- return ofs->config.redirect_dir;
-}
-
-void ovl_clear_redirect_dir(struct super_block *sb)
-{
- struct ovl_fs *ofs = sb->s_fs_info;
-
- ofs->config.redirect_dir = false;
+ return ofs->config.redirect_dir && !ofs->noxattr;
}
const char *ovl_dentry_get_redirect(struct dentry *dentry)
@@ -303,3 +303,59 @@ void ovl_copy_up_end(struct dentry *dentry)
wake_up_locked(&ofs->copyup_wq);
spin_unlock(&ofs->copyup_wq.lock);
}
+
+bool ovl_check_dir_xattr(struct dentry *dentry, const char *name)
+{
+ int res;
+ char val;
+
+ if (!d_is_dir(dentry))
+ return false;
+
+ res = vfs_getxattr(dentry, name, &val, 1);
+ if (res == 1 && val == 'y')
+ return true;
+
+ return false;
+}
+
+int ovl_check_setxattr(struct dentry *dentry, struct dentry *upperdentry,
+ const char *name, const void *value, size_t size,
+ int xerr)
+{
+ int err;
+ struct ovl_fs *ofs = dentry->d_sb->s_fs_info;
+
+ if (ofs->noxattr)
+ return xerr;
+
+ err = ovl_do_setxattr(upperdentry, name, value, size, 0);
+
+ if (err == -EOPNOTSUPP) {
+ pr_warn("overlayfs: cannot set %s xattr on upper\n", name);
+ ofs->noxattr = true;
+ return xerr;
+ }
+
+ return err;
+}
+
+int ovl_set_impure(struct dentry *dentry, struct dentry *upperdentry)
+{
+ int err;
+ struct ovl_entry *oe = dentry->d_fsdata;
+
+ if (oe->impure)
+ return 0;
+
+ /*
+ * Do not fail when upper doesn't support xattrs.
+ * Upper inodes won't have origin nor redirect xattr anyway.
+ */
+ err = ovl_check_setxattr(dentry, upperdentry, OVL_XATTR_IMPURE,
+ "y", 1, 0);
+ if (!err)
+ oe->impure = true;
+
+ return err;
+}
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 45f6bf68fff3..f1e1927ccd48 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -821,7 +821,7 @@ static ssize_t mem_rw(struct file *file, char __user *buf,
if (!mmget_not_zero(mm))
goto free;
- flags = write ? FOLL_WRITE : 0;
+ flags = FOLL_FORCE | (write ? FOLL_WRITE : 0);
while (count > 0) {
int this_len = min_t(int, count, PAGE_SIZE);
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index f02eb7673392..a7048eafa8e6 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -1280,7 +1280,6 @@ xfs_bmap_read_extents(
xfs_bmbt_rec_t *frp;
xfs_fsblock_t nextbno;
xfs_extnum_t num_recs;
- xfs_extnum_t start;
num_recs = xfs_btree_get_numrecs(block);
if (unlikely(i + num_recs > room)) {
@@ -1303,7 +1302,6 @@ xfs_bmap_read_extents(
* Copy records into the extent records.
*/
frp = XFS_BMBT_REC_ADDR(mp, block, 1);
- start = i;
for (j = 0; j < num_recs; j++, i++, frp++) {
xfs_bmbt_rec_host_t *trp = xfs_iext_get_ext(ifp, i);
trp->l0 = be64_to_cpu(frp->l0);
@@ -2065,8 +2063,10 @@ xfs_bmap_add_extent_delay_real(
}
temp = xfs_bmap_worst_indlen(bma->ip, temp);
temp2 = xfs_bmap_worst_indlen(bma->ip, temp2);
- diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) -
- (bma->cur ? bma->cur->bc_private.b.allocated : 0));
+ diff = (int)(temp + temp2 -
+ (startblockval(PREV.br_startblock) -
+ (bma->cur ?
+ bma->cur->bc_private.b.allocated : 0)));
if (diff > 0) {
error = xfs_mod_fdblocks(bma->ip->i_mount,
-((int64_t)diff), false);
@@ -2123,7 +2123,6 @@ xfs_bmap_add_extent_delay_real(
temp = da_new;
if (bma->cur)
temp += bma->cur->bc_private.b.allocated;
- ASSERT(temp <= da_old);
if (temp < da_old)
xfs_mod_fdblocks(bma->ip->i_mount,
(int64_t)(da_old - temp), false);
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index 5392674bf893..3a673ba201aa 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -4395,7 +4395,7 @@ xfs_btree_visit_blocks(
xfs_btree_readahead_ptr(cur, ptr, 1);
/* save for the next iteration of the loop */
- lptr = *ptr;
+ xfs_btree_copy_ptrs(cur, &lptr, ptr, 1);
}
/* for each buffer in the level */
diff --git a/fs/xfs/libxfs/xfs_refcount.c b/fs/xfs/libxfs/xfs_refcount.c
index b177ef33cd4c..82a38d86ebad 100644
--- a/fs/xfs/libxfs/xfs_refcount.c
+++ b/fs/xfs/libxfs/xfs_refcount.c
@@ -1629,13 +1629,28 @@ xfs_refcount_recover_cow_leftovers(
if (mp->m_sb.sb_agblocks >= XFS_REFC_COW_START)
return -EOPNOTSUPP;
- error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agbp);
+ INIT_LIST_HEAD(&debris);
+
+ /*
+ * In this first part, we use an empty transaction to gather up
+ * all the leftover CoW extents so that we can subsequently
+ * delete them. The empty transaction is used to avoid
+ * a buffer lock deadlock if there happens to be a loop in the
+ * refcountbt because we're allowed to re-grab a buffer that is
+ * already attached to our transaction. When we're done
+ * recording the CoW debris we cancel the (empty) transaction
+ * and everything goes away cleanly.
+ */
+ error = xfs_trans_alloc_empty(mp, &tp);
if (error)
return error;
- cur = xfs_refcountbt_init_cursor(mp, NULL, agbp, agno, NULL);
+
+ error = xfs_alloc_read_agf(mp, tp, agno, 0, &agbp);
+ if (error)
+ goto out_trans;
+ cur = xfs_refcountbt_init_cursor(mp, tp, agbp, agno, NULL);
/* Find all the leftover CoW staging extents. */
- INIT_LIST_HEAD(&debris);
memset(&low, 0, sizeof(low));
memset(&high, 0, sizeof(high));
low.rc.rc_startblock = XFS_REFC_COW_START;
@@ -1645,10 +1660,11 @@ xfs_refcount_recover_cow_leftovers(
if (error)
goto out_cursor;
xfs_btree_del_cursor(cur, XFS_BTREE_NOERROR);
- xfs_buf_relse(agbp);
+ xfs_trans_brelse(tp, agbp);
+ xfs_trans_cancel(tp);
/* Now iterate the list to free the leftovers */
- list_for_each_entry(rr, &debris, rr_list) {
+ list_for_each_entry_safe(rr, n, &debris, rr_list) {
/* Set up transaction. */
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0, 0, 0, &tp);
if (error)
@@ -1676,8 +1692,16 @@ xfs_refcount_recover_cow_leftovers(
error = xfs_trans_commit(tp);
if (error)
goto out_free;
+
+ list_del(&rr->rr_list);
+ kmem_free(rr);
}
+ return error;
+out_defer:
+ xfs_defer_cancel(&dfops);
+out_trans:
+ xfs_trans_cancel(tp);
out_free:
/* Free the leftover list */
list_for_each_entry_safe(rr, n, &debris, rr_list) {
@@ -1688,11 +1712,6 @@ out_free:
out_cursor:
xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
- xfs_buf_relse(agbp);
- goto out_free;
-
-out_defer:
- xfs_defer_cancel(&dfops);
- xfs_trans_cancel(tp);
- goto out_free;
+ xfs_trans_brelse(tp, agbp);
+ goto out_trans;
}
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 2b954308a1d6..9e3cc2146d5b 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -582,9 +582,13 @@ xfs_getbmap(
}
break;
default:
+ /* Local format data forks report no extents. */
+ if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL) {
+ bmv->bmv_entries = 0;
+ return 0;
+ }
if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
- ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
- ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
+ ip->i_d.di_format != XFS_DINODE_FMT_BTREE)
return -EINVAL;
if (xfs_get_extsz_hint(ip) ||
@@ -712,7 +716,7 @@ xfs_getbmap(
* extents.
*/
if (map[i].br_startblock == DELAYSTARTBLOCK &&
- map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
+ map[i].br_startoff < XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
ASSERT((iflags & BMV_IF_DELALLOC) != 0);
if (map[i].br_startblock == HOLESTARTBLOCK &&
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index 35703a801372..5fb5a0958a14 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1043,49 +1043,17 @@ xfs_find_get_desired_pgoff(
index = startoff >> PAGE_SHIFT;
endoff = XFS_FSB_TO_B(mp, map->br_startoff + map->br_blockcount);
- end = endoff >> PAGE_SHIFT;
+ end = (endoff - 1) >> PAGE_SHIFT;
do {
int want;
unsigned nr_pages;
unsigned int i;
- want = min_t(pgoff_t, end - index, PAGEVEC_SIZE);
+ want = min_t(pgoff_t, end - index, PAGEVEC_SIZE - 1) + 1;
nr_pages = pagevec_lookup(&pvec, inode->i_mapping, index,
want);
- /*
- * No page mapped into given range. If we are searching holes
- * and if this is the first time we got into the loop, it means
- * that the given offset is landed in a hole, return it.
- *
- * If we have already stepped through some block buffers to find
- * holes but they all contains data. In this case, the last
- * offset is already updated and pointed to the end of the last
- * mapped page, if it does not reach the endpoint to search,
- * that means there should be a hole between them.
- */
- if (nr_pages == 0) {
- /* Data search found nothing */
- if (type == DATA_OFF)
- break;
-
- ASSERT(type == HOLE_OFF);
- if (lastoff == startoff || lastoff < endoff) {
- found = true;
- *offset = lastoff;
- }
- break;
- }
-
- /*
- * At lease we found one page. If this is the first time we
- * step into the loop, and if the first page index offset is
- * greater than the given search offset, a hole was found.
- */
- if (type == HOLE_OFF && lastoff == startoff &&
- lastoff < page_offset(pvec.pages[0])) {
- found = true;
+ if (nr_pages == 0)
break;
- }
for (i = 0; i < nr_pages; i++) {
struct page *page = pvec.pages[i];
@@ -1098,18 +1066,18 @@ xfs_find_get_desired_pgoff(
* file mapping. However, page->index will not change
* because we have a reference on the page.
*
- * Searching done if the page index is out of range.
- * If the current offset is not reaches the end of
- * the specified search range, there should be a hole
- * between them.
+ * If current page offset is beyond where we've ended,
+ * we've found a hole.
*/
- if (page->index > end) {
- if (type == HOLE_OFF && lastoff < endoff) {
- *offset = lastoff;
- found = true;
- }
+ if (type == HOLE_OFF && lastoff < endoff &&
+ lastoff < page_offset(pvec.pages[i])) {
+ found = true;
+ *offset = lastoff;
goto out;
}
+ /* Searching done if the page index is out of range. */
+ if (page->index > end)
+ goto out;
lock_page(page);
/*
@@ -1151,21 +1119,20 @@ xfs_find_get_desired_pgoff(
/*
* The number of returned pages less than our desired, search
- * done. In this case, nothing was found for searching data,
- * but we found a hole behind the last offset.
+ * done.
*/
- if (nr_pages < want) {
- if (type == HOLE_OFF) {
- *offset = lastoff;
- found = true;
- }
+ if (nr_pages < want)
break;
- }
index = pvec.pages[i - 1]->index + 1;
pagevec_release(&pvec);
} while (index <= end);
+ /* No page at lastoff and we are not done - we found a hole. */
+ if (type == HOLE_OFF && lastoff < endoff) {
+ *offset = lastoff;
+ found = true;
+ }
out:
pagevec_release(&pvec);
return found;
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 3683819887a5..814ed729881d 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -828,6 +828,7 @@ xfs_getfsmap(
struct xfs_fsmap dkeys[2]; /* per-dev keys */
struct xfs_getfsmap_dev handlers[XFS_GETFSMAP_DEVS];
struct xfs_getfsmap_info info = { NULL };
+ bool use_rmap;
int i;
int error = 0;
@@ -837,12 +838,14 @@ xfs_getfsmap(
!xfs_getfsmap_is_valid_device(mp, &head->fmh_keys[1]))
return -EINVAL;
+ use_rmap = capable(CAP_SYS_ADMIN) &&
+ xfs_sb_version_hasrmapbt(&mp->m_sb);
head->fmh_entries = 0;
/* Set up our device handlers. */
memset(handlers, 0, sizeof(handlers));
handlers[0].dev = new_encode_dev(mp->m_ddev_targp->bt_dev);
- if (xfs_sb_version_hasrmapbt(&mp->m_sb))
+ if (use_rmap)
handlers[0].fn = xfs_getfsmap_datadev_rmapbt;
else
handlers[0].fn = xfs_getfsmap_datadev_bnobt;
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-03 17:29:06 +0300