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author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-12 19:14:33 +0400 |
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committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-12 19:14:33 +0400 |
commit | 25a765b7f05cb8460fa01b54568894b20e184862 (patch) | |
tree | 0b56db57b4d9f912393ab303c269e0fe6cdf8635 /fs/sysfs/dir.c | |
parent | 9d2be9287107695708e6aae5105a8a518a6cb4d0 (diff) | |
parent | 64282278989d5b0398dcb3ba7904cb00c621dc35 (diff) | |
download | linux-25a765b7f05cb8460fa01b54568894b20e184862.tar.xz |
Merge branch 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into stable/for-linus-3.7
* 'x86/platform' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (9690 commits)
x86: Document x86_init.paging.pagetable_init()
x86: xen: Cleanup and remove x86_init.paging.pagetable_setup_done()
x86: Move paging_init() call to x86_init.paging.pagetable_init()
x86: Rename pagetable_setup_start() to pagetable_init()
x86: Remove base argument from x86_init.paging.pagetable_setup_start
Linux 3.6-rc5
HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
Remove user-triggerable BUG from mpol_to_str
xen/pciback: Fix proper FLR steps.
uml: fix compile error in deliver_alarm()
dj: memory scribble in logi_dj
Fix order of arguments to compat_put_time[spec|val]
xen: Use correct masking in xen_swiotlb_alloc_coherent.
xen: fix logical error in tlb flushing
xen/p2m: Fix one-off error in checking the P2M tree directory.
powerpc: Don't use __put_user() in patch_instruction
powerpc: Make sure IPI handlers see data written by IPI senders
powerpc: Restore correct DSCR in context switch
powerpc: Fix DSCR inheritance in copy_thread()
powerpc: Keep thread.dscr and thread.dscr_inherit in sync
...
Diffstat (limited to 'fs/sysfs/dir.c')
-rw-r--r-- | fs/sysfs/dir.c | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c index e6bb9b2a4cbe..6b0bb00d4d2b 100644 --- a/fs/sysfs/dir.c +++ b/fs/sysfs/dir.c @@ -300,15 +300,16 @@ void release_sysfs_dirent(struct sysfs_dirent * sd) static int sysfs_dentry_delete(const struct dentry *dentry) { struct sysfs_dirent *sd = dentry->d_fsdata; - return !!(sd->s_flags & SYSFS_FLAG_REMOVED); + return !(sd && !(sd->s_flags & SYSFS_FLAG_REMOVED)); } -static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd) +static int sysfs_dentry_revalidate(struct dentry *dentry, unsigned int flags) { struct sysfs_dirent *sd; int is_dir; + int type; - if (nd->flags & LOOKUP_RCU) + if (flags & LOOKUP_RCU) return -ECHILD; sd = dentry->d_fsdata; @@ -326,6 +327,15 @@ static int sysfs_dentry_revalidate(struct dentry *dentry, struct nameidata *nd) if (strcmp(dentry->d_name.name, sd->s_name) != 0) goto out_bad; + /* The sysfs dirent has been moved to a different namespace */ + type = KOBJ_NS_TYPE_NONE; + if (sd->s_parent) { + type = sysfs_ns_type(sd->s_parent); + if (type != KOBJ_NS_TYPE_NONE && + sysfs_info(dentry->d_sb)->ns[type] != sd->s_ns) + goto out_bad; + } + mutex_unlock(&sysfs_mutex); out_valid: return 1; @@ -355,18 +365,15 @@ out_bad: return 0; } -static void sysfs_dentry_iput(struct dentry *dentry, struct inode *inode) +static void sysfs_dentry_release(struct dentry *dentry) { - struct sysfs_dirent * sd = dentry->d_fsdata; - - sysfs_put(sd); - iput(inode); + sysfs_put(dentry->d_fsdata); } -static const struct dentry_operations sysfs_dentry_ops = { +const struct dentry_operations sysfs_dentry_ops = { .d_revalidate = sysfs_dentry_revalidate, .d_delete = sysfs_dentry_delete, - .d_iput = sysfs_dentry_iput, + .d_release = sysfs_dentry_release, }; struct sysfs_dirent *sysfs_new_dirent(const char *name, umode_t mode, int type) @@ -764,7 +771,7 @@ int sysfs_create_dir(struct kobject * kobj) } static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *nd) + unsigned int flags) { struct dentry *ret = NULL; struct dentry *parent = dentry->d_parent; @@ -786,6 +793,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, ret = ERR_PTR(-ENOENT); goto out_unlock; } + dentry->d_fsdata = sysfs_get(sd); /* attach dentry and inode */ inode = sysfs_get_inode(dir->i_sb, sd); @@ -795,16 +803,7 @@ static struct dentry * sysfs_lookup(struct inode *dir, struct dentry *dentry, } /* instantiate and hash dentry */ - ret = d_find_alias(inode); - if (!ret) { - d_set_d_op(dentry, &sysfs_dentry_ops); - dentry->d_fsdata = sysfs_get(sd); - d_add(dentry, inode); - } else { - d_move(ret, dentry); - iput(inode); - } - + ret = d_materialise_unique(dentry, inode); out_unlock: mutex_unlock(&sysfs_mutex); return ret; |