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authorLinus Torvalds <torvalds@linux-foundation.org>2014-06-09 19:08:43 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-06-09 19:08:43 -0700
commitb1cce8032f6abe900b078d24f3c3938726528f97 (patch)
treea387bf49544b0620af61781e3438a908c951a6a3 /fs/cifs/inode.c
parent1c54fc1efe6922b4e7ffd591739d72050976ccd6 (diff)
parent663a962151593c69374776e8651238d0da072459 (diff)
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
Pull CIFS fixes from Steve French. * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: CIFS: Fix memory leaks in SMB2_open cifs: ensure that vol->username is not NULL before running strlen on it Clarify SMB2/SMB3 create context and add missing ones Do not send ClientGUID on SMB2.02 dialect cifs: Set client guid on per connection basis fs/cifs/netmisc.c: convert printk to pr_foo() fs/cifs/cifs.c: replace seq_printf by seq_puts Update cifs version number to 2.03 fs: cifs: new helper: file_inode(file) cifs: fix potential races in cifs_revalidate_mapping cifs: new helper function: cifs_revalidate_mapping cifs: convert booleans in cifsInodeInfo to a flags field cifs: fix cifs_uniqueid_to_ino_t not to ever return 0
Diffstat (limited to 'fs/cifs/inode.c')
-rw-r--r--fs/cifs/inode.c71
1 files changed, 55 insertions, 16 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a22d667f1069..a174605f6afa 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -22,6 +22,7 @@
#include <linux/stat.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
+#include <linux/freezer.h>
#include <asm/div64.h>
#include "cifsfs.h"
#include "cifspdu.h"
@@ -117,7 +118,7 @@ cifs_revalidate_cache(struct inode *inode, struct cifs_fattr *fattr)
cifs_dbg(FYI, "%s: invalidating inode %llu mapping\n",
__func__, cifs_i->uniqueid);
- cifs_i->invalid_mapping = true;
+ set_bit(CIFS_INO_INVALID_MAPPING, &cifs_i->flags);
}
/*
@@ -177,7 +178,10 @@ cifs_fattr_to_inode(struct inode *inode, struct cifs_fattr *fattr)
else
cifs_i->time = jiffies;
- cifs_i->delete_pending = fattr->cf_flags & CIFS_FATTR_DELETE_PENDING;
+ if (fattr->cf_flags & CIFS_FATTR_DELETE_PENDING)
+ set_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
+ else
+ clear_bit(CIFS_INO_DELETE_PENDING, &cifs_i->flags);
cifs_i->server_eof = fattr->cf_eof;
/*
@@ -1121,7 +1125,7 @@ cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
}
/* try to set DELETE_ON_CLOSE */
- if (!cifsInode->delete_pending) {
+ if (!test_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags)) {
rc = CIFSSMBSetFileDisposition(xid, tcon, true, fid.netfid,
current->tgid);
/*
@@ -1138,7 +1142,7 @@ cifs_rename_pending_delete(const char *full_path, struct dentry *dentry,
rc = -EBUSY;
goto undo_rename;
}
- cifsInode->delete_pending = true;
+ set_bit(CIFS_INO_DELETE_PENDING, &cifsInode->flags);
}
out_close:
@@ -1759,23 +1763,62 @@ int
cifs_invalidate_mapping(struct inode *inode)
{
int rc = 0;
- struct cifsInodeInfo *cifs_i = CIFS_I(inode);
-
- cifs_i->invalid_mapping = false;
if (inode->i_mapping && inode->i_mapping->nrpages != 0) {
rc = invalidate_inode_pages2(inode->i_mapping);
- if (rc) {
+ if (rc)
cifs_dbg(VFS, "%s: could not invalidate inode %p\n",
__func__, inode);
- cifs_i->invalid_mapping = true;
- }
}
cifs_fscache_reset_inode_cookie(inode);
return rc;
}
+/**
+ * cifs_wait_bit_killable - helper for functions that are sleeping on bit locks
+ * @word: long word containing the bit lock
+ */
+static int
+cifs_wait_bit_killable(void *word)
+{
+ if (fatal_signal_pending(current))
+ return -ERESTARTSYS;
+ freezable_schedule_unsafe();
+ return 0;
+}
+
+int
+cifs_revalidate_mapping(struct inode *inode)
+{
+ int rc;
+ unsigned long *flags = &CIFS_I(inode)->flags;
+
+ rc = wait_on_bit_lock(flags, CIFS_INO_LOCK, cifs_wait_bit_killable,
+ TASK_KILLABLE);
+ if (rc)
+ return rc;
+
+ if (test_and_clear_bit(CIFS_INO_INVALID_MAPPING, flags)) {
+ rc = cifs_invalidate_mapping(inode);
+ if (rc)
+ set_bit(CIFS_INO_INVALID_MAPPING, flags);
+ }
+
+ clear_bit_unlock(CIFS_INO_LOCK, flags);
+ smp_mb__after_atomic();
+ wake_up_bit(flags, CIFS_INO_LOCK);
+
+ return rc;
+}
+
+int
+cifs_zap_mapping(struct inode *inode)
+{
+ set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(inode)->flags);
+ return cifs_revalidate_mapping(inode);
+}
+
int cifs_revalidate_file_attr(struct file *filp)
{
int rc = 0;
@@ -1842,9 +1885,7 @@ int cifs_revalidate_file(struct file *filp)
if (rc)
return rc;
- if (CIFS_I(inode)->invalid_mapping)
- rc = cifs_invalidate_mapping(inode);
- return rc;
+ return cifs_revalidate_mapping(inode);
}
/* revalidate a dentry's inode attributes */
@@ -1857,9 +1898,7 @@ int cifs_revalidate_dentry(struct dentry *dentry)
if (rc)
return rc;
- if (CIFS_I(inode)->invalid_mapping)
- rc = cifs_invalidate_mapping(inode);
- return rc;
+ return cifs_revalidate_mapping(inode);
}
int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,