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-rw-r--r--fs/compat.c14
-rw-r--r--fs/exec.c10
-rw-r--r--fs/fcntl.c10
-rw-r--r--fs/fuse/file.c3
-rw-r--r--fs/internal.h2
-rw-r--r--fs/jfs/Kconfig1
-rw-r--r--fs/jfs/jfs_extent.c63
-rw-r--r--fs/jfs/jfs_imap.c10
-rw-r--r--fs/jfs/jfs_metapage.c18
-rw-r--r--fs/jfs/jfs_types.h29
-rw-r--r--fs/jfs/jfs_xtree.c263
-rw-r--r--fs/jfs/jfs_xtree.h2
-rw-r--r--fs/jfs/super.c4
-rw-r--r--fs/proc/base.c50
14 files changed, 87 insertions, 392 deletions
diff --git a/fs/compat.c b/fs/compat.c
index 5e374aad33f..55efdfebdf5 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1420,12 +1420,17 @@ int compat_do_execve(char * filename,
{
struct linux_binprm *bprm;
struct file *file;
+ struct files_struct *displaced;
int retval;
+ retval = unshare_files(&displaced);
+ if (retval)
+ goto out_ret;
+
retval = -ENOMEM;
bprm = kzalloc(sizeof(*bprm), GFP_KERNEL);
if (!bprm)
- goto out_ret;
+ goto out_files;
retval = mutex_lock_interruptible(&current->cred_exec_mutex);
if (retval < 0)
@@ -1436,7 +1441,7 @@ int compat_do_execve(char * filename,
bprm->cred = prepare_exec_creds();
if (!bprm->cred)
goto out_unlock;
- check_unsafe_exec(bprm, current->files);
+ check_unsafe_exec(bprm);
file = open_exec(filename);
retval = PTR_ERR(file);
@@ -1487,6 +1492,8 @@ int compat_do_execve(char * filename,
mutex_unlock(&current->cred_exec_mutex);
acct_update_integrals(current);
free_bprm(bprm);
+ if (displaced)
+ put_files_struct(displaced);
return retval;
out:
@@ -1506,6 +1513,9 @@ out_unlock:
out_free:
free_bprm(bprm);
+out_files:
+ if (displaced)
+ reset_files_struct(displaced);
out_ret:
return retval;
}
diff --git a/fs/exec.c b/fs/exec.c
index b9f1c144b7a..c5128fbc916 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1056,28 +1056,24 @@ EXPORT_SYMBOL(install_exec_creds);
* - the caller must hold current->cred_exec_mutex to protect against
* PTRACE_ATTACH
*/
-void check_unsafe_exec(struct linux_binprm *bprm, struct files_struct *files)
+void check_unsafe_exec(struct linux_binprm *bprm)
{
struct task_struct *p = current, *t;
unsigned long flags;
- unsigned n_fs, n_files, n_sighand;
+ unsigned n_fs, n_sighand;
bprm->unsafe = tracehook_unsafe_exec(p);
n_fs = 1;
- n_files = 1;
n_sighand = 1;
lock_task_sighand(p, &flags);
for (t = next_thread(p); t != p; t = next_thread(t)) {
if (t->fs == p->fs)
n_fs++;
- if (t->files == files)
- n_files++;
n_sighand++;
}
if (atomic_read(&p->fs->count) > n_fs ||
- atomic_read(&p->files->count) > n_files ||
atomic_read(&p->sighand->count) > n_sighand)
bprm->unsafe |= LSM_UNSAFE_SHARE;
@@ -1300,7 +1296,7 @@ int do_execve(char * filename,
bprm->cred = prepare_exec_creds();
if (!bprm->cred)
goto out_unlock;
- check_unsafe_exec(bprm, displaced);
+ check_unsafe_exec(bprm);
file = open_exec(filename);
retval = PTR_ERR(file);
diff --git a/fs/fcntl.c b/fs/fcntl.c
index d865ca66ccb..cc8e4de2fee 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -531,6 +531,12 @@ int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fap
if (!new)
return -ENOMEM;
}
+
+ /*
+ * We need to take f_lock first since it's not an IRQ-safe
+ * lock.
+ */
+ spin_lock(&filp->f_lock);
write_lock_irq(&fasync_lock);
for (fp = fapp; (fa = *fp) != NULL; fp = &fa->fa_next) {
if (fa->fa_file == filp) {
@@ -555,14 +561,12 @@ int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fap
result = 1;
}
out:
- /* Fix up FASYNC bit while still holding fasync_lock */
- spin_lock(&filp->f_lock);
if (on)
filp->f_flags |= FASYNC;
else
filp->f_flags &= ~FASYNC;
- spin_unlock(&filp->f_lock);
write_unlock_irq(&fasync_lock);
+ spin_unlock(&filp->f_lock);
return result;
}
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index d9fdb7cec53..821d10f719b 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1465,7 +1465,7 @@ static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
case SEEK_END:
retval = fuse_update_attributes(inode, NULL, file, NULL);
if (retval)
- return retval;
+ goto exit;
offset += i_size_read(inode);
break;
case SEEK_CUR:
@@ -1479,6 +1479,7 @@ static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
}
retval = offset;
}
+exit:
mutex_unlock(&inode->i_mutex);
return retval;
}
diff --git a/fs/internal.h b/fs/internal.h
index 0d8ac497b3d..53af885f173 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -43,7 +43,7 @@ extern void __init chrdev_init(void);
/*
* exec.c
*/
-extern void check_unsafe_exec(struct linux_binprm *, struct files_struct *);
+extern void check_unsafe_exec(struct linux_binprm *);
/*
* namespace.c
diff --git a/fs/jfs/Kconfig b/fs/jfs/Kconfig
index 9ff619a6f9c..57cef19951d 100644
--- a/fs/jfs/Kconfig
+++ b/fs/jfs/Kconfig
@@ -1,6 +1,7 @@
config JFS_FS
tristate "JFS filesystem support"
select NLS
+ select CRC32
help
This is a port of IBM's Journaled Filesystem . More information is
available in the file <file:Documentation/filesystems/jfs.txt>.
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index 169802ea07f..bbbd5f202e3 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -362,11 +362,12 @@ exit:
int extHint(struct inode *ip, s64 offset, xad_t * xp)
{
struct super_block *sb = ip->i_sb;
- struct xadlist xadl;
- struct lxdlist lxdl;
- lxd_t lxd;
+ int nbperpage = JFS_SBI(sb)->nbperpage;
s64 prev;
- int rc, nbperpage = JFS_SBI(sb)->nbperpage;
+ int rc = 0;
+ s64 xaddr;
+ int xlen;
+ int xflag;
/* init the hint as "no hint provided" */
XADaddress(xp, 0);
@@ -376,46 +377,30 @@ int extHint(struct inode *ip, s64 offset, xad_t * xp)
*/
prev = ((offset & ~POFFSET) >> JFS_SBI(sb)->l2bsize) - nbperpage;
- /* if the offsets in the first page of the file,
- * no hint provided.
+ /* if the offset is in the first page of the file, no hint provided.
*/
if (prev < 0)
- return (0);
-
- /* prepare to lookup the previous page's extent info */
- lxdl.maxnlxd = 1;
- lxdl.nlxd = 1;
- lxdl.lxd = &lxd;
- LXDoffset(&lxd, prev)
- LXDlength(&lxd, nbperpage);
-
- xadl.maxnxad = 1;
- xadl.nxad = 0;
- xadl.xad = xp;
-
- /* perform the lookup */
- if ((rc = xtLookupList(ip, &lxdl, &xadl, 0)))
- return (rc);
-
- /* check if no extent exists for the previous page.
- * this is possible for sparse files.
- */
- if (xadl.nxad == 0) {
-// assert(ISSPARSE(ip));
- return (0);
- }
+ goto out;
- /* only preserve the abnr flag within the xad flags
- * of the returned hint.
- */
- xp->flag &= XAD_NOTRECORDED;
+ rc = xtLookup(ip, prev, nbperpage, &xflag, &xaddr, &xlen, 0);
- if(xadl.nxad != 1 || lengthXAD(xp) != nbperpage) {
- jfs_error(ip->i_sb, "extHint: corrupt xtree");
- return -EIO;
- }
+ if ((rc == 0) && xlen) {
+ if (xlen != nbperpage) {
+ jfs_error(ip->i_sb, "extHint: corrupt xtree");
+ rc = -EIO;
+ }
+ XADaddress(xp, xaddr);
+ XADlength(xp, xlen);
+ /*
+ * only preserve the abnr flag within the xad flags
+ * of the returned hint.
+ */
+ xp->flag = xflag & XAD_NOTRECORDED;
+ } else
+ rc = 0;
- return (0);
+out:
+ return (rc);
}
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 0f94381ca6d..346057218ed 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -57,12 +57,6 @@
#include "jfs_debug.h"
/*
- * __mark_inode_dirty expects inodes to be hashed. Since we don't want
- * special inodes in the fileset inode space, we make them appear hashed,
- * but do not put on any lists.
- */
-
-/*
* imap locks
*/
/* iag free list lock */
@@ -497,7 +491,9 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
release_metapage(mp);
/*
- * that will look hashed, but won't be on any list; hlist_del()
+ * __mark_inode_dirty expects inodes to be hashed. Since we don't
+ * want special inodes in the fileset inode space, we make them
+ * appear hashed, but do not put on any lists. hlist_del()
* will work fine and require no locking.
*/
ip->i_hash.pprev = &ip->i_hash.next;
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index c350057087d..07b6c5dfb4b 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -369,6 +369,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
unsigned long bio_bytes = 0;
unsigned long bio_offset = 0;
int offset;
+ int bad_blocks = 0;
page_start = (sector_t)page->index <<
(PAGE_CACHE_SHIFT - inode->i_blkbits);
@@ -394,6 +395,7 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
}
clear_bit(META_dirty, &mp->flag);
+ set_bit(META_io, &mp->flag);
block_offset = offset >> inode->i_blkbits;
lblock = page_start + block_offset;
if (bio) {
@@ -402,7 +404,6 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
len = min(xlen, blocks_per_mp);
xlen -= len;
bio_bytes += len << inode->i_blkbits;
- set_bit(META_io, &mp->flag);
continue;
}
/* Not contiguous */
@@ -424,12 +425,14 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
xlen = (PAGE_CACHE_SIZE - offset) >> inode->i_blkbits;
pblock = metapage_get_blocks(inode, lblock, &xlen);
if (!pblock) {
- /* Need better error handling */
printk(KERN_ERR "JFS: metapage_get_blocks failed\n");
- dec_io(page, last_write_complete);
+ /*
+ * We already called inc_io(), but can't cancel it
+ * with dec_io() until we're done with the page
+ */
+ bad_blocks++;
continue;
}
- set_bit(META_io, &mp->flag);
len = min(xlen, (int)JFS_SBI(inode->i_sb)->nbperpage);
bio = bio_alloc(GFP_NOFS, 1);
@@ -459,6 +462,9 @@ static int metapage_writepage(struct page *page, struct writeback_control *wbc)
unlock_page(page);
+ if (bad_blocks)
+ goto err_out;
+
if (nr_underway == 0)
end_page_writeback(page);
@@ -474,7 +480,9 @@ skip:
bio_put(bio);
unlock_page(page);
dec_io(page, last_write_complete);
-
+err_out:
+ while (bad_blocks--)
+ dec_io(page, last_write_complete);
return -EIO;
}
diff --git a/fs/jfs/jfs_types.h b/fs/jfs/jfs_types.h
index 649f9817acc..43ea3713c08 100644
--- a/fs/jfs/jfs_types.h
+++ b/fs/jfs/jfs_types.h
@@ -58,35 +58,6 @@ struct timestruc_t {
#define ONES 0xffffffffu /* all bit on */
/*
- * logical xd (lxd)
- */
-typedef struct {
- unsigned len:24;
- unsigned off1:8;
- u32 off2;
-} lxd_t;
-
-/* lxd_t field construction */
-#define LXDlength(lxd, length32) ( (lxd)->len = length32 )
-#define LXDoffset(lxd, offset64)\
-{\
- (lxd)->off1 = ((s64)offset64) >> 32;\
- (lxd)->off2 = (offset64) & 0xffffffff;\
-}
-
-/* lxd_t field extraction */
-#define lengthLXD(lxd) ( (lxd)->len )
-#define offsetLXD(lxd)\
- ( ((s64)((lxd)->off1)) << 32 | (lxd)->off2 )
-
-/* lxd list */
-struct lxdlist {
- s16 maxnlxd;
- s16 nlxd;
- lxd_t *lxd;
-};
-
-/*
* physical xd (pxd)
*/
typedef struct {
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index a27e26c9056..d654a645864 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -164,11 +164,8 @@ int xtLookup(struct inode *ip, s64 lstart,
/* is lookup offset beyond eof ? */
size = ((u64) ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
JFS_SBI(ip->i_sb)->l2bsize;
- if (lstart >= size) {
- jfs_err("xtLookup: lstart (0x%lx) >= size (0x%lx)",
- (ulong) lstart, (ulong) size);
+ if (lstart >= size)
return 0;
- }
}
/*
@@ -220,264 +217,6 @@ int xtLookup(struct inode *ip, s64 lstart,
return rc;
}
-
-/*
- * xtLookupList()
- *
- * function: map a single logical extent into a list of physical extent;
- *
- * parameter:
- * struct inode *ip,
- * struct lxdlist *lxdlist, lxd list (in)
- * struct xadlist *xadlist, xad list (in/out)
- * int flag)
- *
- * coverage of lxd by xad under assumption of
- * . lxd's are ordered and disjoint.
- * . xad's are ordered and disjoint.
- *
- * return:
- * 0: success
- *
- * note: a page being written (even a single byte) is backed fully,
- * except the last page which is only backed with blocks
- * required to cover the last byte;
- * the extent backing a page is fully contained within an xad;
- */
-int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
- struct xadlist * xadlist, int flag)
-{
- int rc = 0;
- struct btstack btstack;
- int cmp;
- s64 bn;
- struct metapage *mp;
- xtpage_t *p;
- int index;
- lxd_t *lxd;
- xad_t *xad, *pxd;
- s64 size, lstart, lend, xstart, xend, pstart;
- s64 llen, xlen, plen;
- s64 xaddr, paddr;
- int nlxd, npxd, maxnpxd;
-
- npxd = xadlist->nxad = 0;
- maxnpxd = xadlist->maxnxad;
- pxd = xadlist->xad;
-
- nlxd = lxdlist->nlxd;
- lxd = lxdlist->lxd;
-
- lstart = offsetLXD(lxd);
- llen = lengthLXD(lxd);
- lend = lstart + llen;
-
- size = (ip->i_size + (JFS_SBI(ip->i_sb)->bsize - 1)) >>
- JFS_SBI(ip->i_sb)->l2bsize;
-
- /*
- * search for the xad entry covering the logical extent
- */
- search:
- if (lstart >= size)
- return 0;
-
- if ((rc = xtSearch(ip, lstart, NULL, &cmp, &btstack, 0)))
- return rc;
-
- /*
- * compute the physical extent covering logical extent
- *
- * N.B. search may have failed (e.g., hole in sparse file),
- * and returned the index of the next entry.
- */
-//map:
- /* retrieve search result */
- XT_GETSEARCH(ip, btstack.top, bn, mp, p, index);
-
- /* is xad on the next sibling page ? */
- if (index == le16_to_cpu(p->header.nextindex)) {
- if (p->header.flag & BT_ROOT)
- goto mapend;
-
- if ((bn = le64_to_cpu(p->header.next)) == 0)
- goto mapend;
-
- XT_PUTPAGE(mp);
-
- /* get next sibling page */
- XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
- if (rc)
- return rc;
-
- index = XTENTRYSTART;
- }
-
- xad = &p->xad[index];
-
- /*
- * is lxd covered by xad ?
- */
- compare:
- xstart = offsetXAD(xad);
- xlen = lengthXAD(xad);
- xend = xstart + xlen;
- xaddr = addressXAD(xad);
-
- compare1:
- if (xstart < lstart)
- goto compare2;
-
- /* (lstart <= xstart) */
-
- /* lxd is NOT covered by xad */
- if (lend <= xstart) {
- /*
- * get next lxd
- */
- if (--nlxd == 0)
- goto mapend;
- lxd++;
-
- lstart = offsetLXD(lxd);
- llen = lengthLXD(lxd);
- lend = lstart + llen;
- if (lstart >= size)
- goto mapend;
-
- /* compare with the current xad */
- goto compare1;
- }
- /* lxd is covered by xad */
- else { /* (xstart < lend) */
-
- /* initialize new pxd */
- pstart = xstart;
- plen = min(lend - xstart, xlen);
- paddr = xaddr;
-
- goto cover;
- }
-
- /* (xstart < lstart) */
- compare2:
- /* lxd is covered by xad */
- if (lstart < xend) {
- /* initialize new pxd */
- pstart = lstart;
- plen = min(xend - lstart, llen);
- paddr = xaddr + (lstart - xstart);
-
- goto cover;
- }
- /* lxd is NOT covered by xad */
- else { /* (xend <= lstart) */
-
- /*
- * get next xad
- *
- * linear search next xad covering lxd on
- * the current xad page, and then tree search
- */
- if (index == le16_to_cpu(p->header.nextindex) - 1) {
- if (p->header.flag & BT_ROOT)
- goto mapend;
-
- XT_PUTPAGE(mp);
- goto search;
- } else {
- index++;
- xad++;
-
- /* compare with new xad */
- goto compare;
- }
- }
-
- /*
- * lxd is covered by xad and a new pxd has been initialized
- * (lstart <= xstart < lend) or (xstart < lstart < xend)
- */
- cover:
- /* finalize pxd corresponding to current xad */
- XT_PUTENTRY(pxd, xad->flag, pstart, plen, paddr);
-
- if (++npxd >= maxnpxd)
- goto mapend;
- pxd++;
-
- /*
- * lxd is fully covered by xad
- */
- if (lend <= xend) {
- /*
- * get next lxd
- */
- if (--nlxd == 0)
- goto mapend;
- lxd++;
-
- lstart = offsetLXD(lxd);
- llen = lengthLXD(lxd);
- lend = lstart + llen;
- if (lstart >= size)
- goto mapend;
-
- /*
- * test for old xad covering new lxd
- * (old xstart < new lstart)
- */
- goto compare2;
- }
- /*
- * lxd is partially covered by xad
- */
- else { /* (xend < lend) */
-
- /*
- * get next xad
- *
- * linear search next xad covering lxd on
- * the current xad page, and then next xad page search
- */
- if (index == le16_to_cpu(p->header.nextindex) - 1) {
- if (p->header.flag & BT_ROOT)
- goto mapend;
-
- if ((bn = le64_to_cpu(p->header.next)) == 0)
- goto mapend;
-
- XT_PUTPAGE(mp);
-
- /* get next sibling page */
- XT_GETPAGE(ip, bn, mp, PSIZE, p, rc);
- if (rc)
- return rc;
-
- index = XTENTRYSTART;
- xad = &p->xad[index];
- } else {
- index++;
- xad++;
- }
-
- /*
- * test for new xad covering old lxd
- * (old lstart < new xstart)
- */
- goto compare;
- }
-
- mapend:
- xadlist->nxad = npxd;
-
-//out:
- XT_PUTPAGE(mp);
-
- return rc;
-}
-
-
/*
* xtSearch()
*
diff --git a/fs/jfs/jfs_xtree.h b/fs/jfs/jfs_xtree.h
index 70815c8a3d6..08c0c749b98 100644
--- a/fs/jfs/jfs_xtree.h
+++ b/fs/jfs/jfs_xtree.h
@@ -110,8 +110,6 @@ typedef union {
*/
extern int xtLookup(struct inode *ip, s64 lstart, s64 llen,
int *pflag, s64 * paddr, int *plen, int flag);
-extern int xtLookupList(struct inode *ip, struct lxdlist * lxdlist,
- struct xadlist * xadlist, int flag);
extern void xtInitRoot(tid_t tid, struct inode *ip);
extern int xtInsert(tid_t tid, struct inode *ip,
int xflag, s64 xoff, int xlen, s64 * xaddrp, int flag);
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index b37d1f78b85..6f21adf9479 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -29,6 +29,7 @@
#include <linux/posix_acl.h>
#include <linux/buffer_head.h>
#include <linux/exportfs.h>
+#include <linux/crc32.h>
#include <asm/uaccess.h>
#include <linux/seq_file.h>
@@ -168,6 +169,9 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
buf->f_files = maxinodes;
buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
atomic_read(&imap->im_numfree));
+ buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
+ buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
+ sizeof(sbi->uuid)/2);
buf->f_namelen = JFS_NAME_MAX;
return 0;
diff --git a/fs/proc/base.c b/fs/proc/base.c
index aef6d55b7de..e0afd326b68 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -146,15 +146,22 @@ static unsigned int pid_entry_count_dirs(const struct pid_entry *entries,
return count;
}
-static struct fs_struct *get_fs_struct(struct task_struct *task)
+static int get_fs_path(struct task_struct *task, struct path *path, bool root)
{
struct fs_struct *fs;
+ int result = -ENOENT;
+
task_lock(task);
fs = task->fs;
- if(fs)
- atomic_inc(&fs->count);
+ if (fs) {
+ read_lock(&fs->lock);
+ *path = root ? fs->root : fs->pwd;
+ path_get(path);
+ read_unlock(&fs->lock);
+ result = 0;
+ }
task_unlock(task);
- return fs;
+ return result;
}
static int get_nr_threads(struct task_struct *tsk)
@@ -172,42 +179,24 @@ static int get_nr_threads(struct task_struct *tsk)
static int proc_cwd_link(struct inode *inode, struct path *path)
{
struct task_struct *task = get_proc_task(inode);
- struct fs_struct *fs = NULL;
int result = -ENOENT;
if (task) {
- fs = get_fs_struct(task);
+ result = get_fs_path(task, path, 0);
put_task_struct(task);
}
- if (fs) {
- read_lock(&fs->lock);
- *path = fs->pwd;
- path_get(&fs->pwd);
- read_unlock(&fs->lock);
- result = 0;
- put_fs_struct(fs);
- }
return result;
}
static int proc_root_link(struct inode *inode, struct path *path)
{
struct task_struct *task = get_proc_task(inode);
- struct fs_struct *fs = NULL;
int result = -ENOENT;
if (task) {
- fs = get_fs_struct(task);
+ result = get_fs_path(task, path, 1);
put_task_struct(task);
}
- if (fs) {
- read_lock(&fs->lock);
- *path = fs->root;
- path_get(&fs->root);
- read_unlock(&fs->lock);
- result = 0;
- put_fs_struct(fs);
- }
return result;
}
@@ -596,7 +585,6 @@ static int mounts_open_common(struct inode *inode, struct file *file,
struct task_struct *task = get_proc_task(inode);
struct nsproxy *nsp;
struct mnt_namespace *ns = NULL;
- struct fs_struct *fs = NULL;
struct path root;
struct proc_mounts *p;
int ret = -EINVAL;
@@ -610,22 +598,16 @@ static int mounts_open_common(struct inode *inode, struct file *file,
get_mnt_ns(ns);
}
rcu_read_unlock();
- if (ns)
- fs = get_fs_struct(task);
+ if (ns && get_fs_path(task, &root, 1) == 0)
+ ret = 0;
put_task_struct(task);
}
if (!ns)
goto err;
- if (!fs)
+ if (ret)
goto err_put_ns;
- read_lock(&fs->lock);
- root = fs->root;
- path_get(&root);
- read_unlock(&fs->lock);
- put_fs_struct(fs);
-
ret = -ENOMEM;
p = kmalloc(sizeof(struct proc_mounts), GFP_KERNEL);
if (!p)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-30 18:58:41 +0000