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Diffstat (limited to 'fs/nfs/dir.c')
-rw-r--r--fs/nfs/dir.c100
1 files changed, 76 insertions, 24 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 7468735d299..854a8f05a61 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -43,6 +43,8 @@
#include "internal.h"
#include "fscache.h"
+#include "nfstrace.h"
+
/* #define NFS_DEBUG_VERBOSE 1 */
static int nfs_opendir(struct inode *, struct file *);
@@ -1100,7 +1102,9 @@ static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags)
if (IS_ERR(label))
goto out_error;
+ trace_nfs_lookup_revalidate_enter(dir, dentry, flags);
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
+ trace_nfs_lookup_revalidate_exit(dir, dentry, flags, error);
if (error)
goto out_bad;
if (nfs_compare_fh(NFS_FH(inode), fhandle))
@@ -1312,6 +1316,7 @@ struct dentry *nfs_lookup(struct inode *dir, struct dentry * dentry, unsigned in
parent = dentry->d_parent;
/* Protect against concurrent sillydeletes */
+ trace_nfs_lookup_enter(dir, dentry, flags);
nfs_block_sillyrename(parent);
error = NFS_PROTO(dir)->lookup(dir, &dentry->d_name, fhandle, fattr, label);
if (error == -ENOENT)
@@ -1338,6 +1343,7 @@ no_entry:
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
out_unblock_sillyrename:
nfs_unblock_sillyrename(parent);
+ trace_nfs_lookup_exit(dir, dentry, flags, error);
nfs4_label_free(label);
out:
nfs_free_fattr(fattr);
@@ -1386,13 +1392,15 @@ static int nfs_finish_open(struct nfs_open_context *ctx,
{
int err;
+ if ((open_flags & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL))
+ *opened |= FILE_CREATED;
+
err = finish_open(file, dentry, do_open, opened);
if (err)
goto out;
nfs_file_set_open_context(file, ctx);
out:
- put_nfs_open_context(ctx);
return err;
}
@@ -1404,6 +1412,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
struct dentry *res;
struct iattr attr = { .ia_valid = ATTR_OPEN };
struct inode *inode;
+ unsigned int lookup_flags = 0;
int err;
/* Expect a negative dentry */
@@ -1412,6 +1421,10 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
dfprintk(VFS, "NFS: atomic_open(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
+ err = nfs_check_flags(open_flags);
+ if (err)
+ return err;
+
/* NFS only supports OPEN on regular files */
if ((open_flags & O_DIRECTORY)) {
if (!d_unhashed(dentry)) {
@@ -1422,6 +1435,7 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
*/
return -ENOENT;
}
+ lookup_flags = LOOKUP_OPEN|LOOKUP_DIRECTORY;
goto no_open;
}
@@ -1442,12 +1456,14 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
if (IS_ERR(ctx))
goto out;
+ trace_nfs_atomic_open_enter(dir, ctx, open_flags);
nfs_block_sillyrename(dentry->d_parent);
inode = NFS_PROTO(dir)->open_context(dir, ctx, open_flags, &attr);
nfs_unblock_sillyrename(dentry->d_parent);
if (IS_ERR(inode)) {
- put_nfs_open_context(ctx);
err = PTR_ERR(inode);
+ trace_nfs_atomic_open_exit(dir, ctx, open_flags, err);
+ put_nfs_open_context(ctx);
switch (err) {
case -ENOENT:
d_drop(dentry);
@@ -1468,11 +1484,13 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry,
}
err = nfs_finish_open(ctx, ctx->dentry, file, open_flags, opened);
+ trace_nfs_atomic_open_exit(dir, ctx, open_flags, err);
+ put_nfs_open_context(ctx);
out:
return err;
no_open:
- res = nfs_lookup(dir, dentry, 0);
+ res = nfs_lookup(dir, dentry, lookup_flags);
err = PTR_ERR(res);
if (IS_ERR(res))
goto out;
@@ -1596,7 +1614,9 @@ int nfs_create(struct inode *dir, struct dentry *dentry,
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
+ trace_nfs_create_enter(dir, dentry, open_flags);
error = NFS_PROTO(dir)->create(dir, dentry, &attr, open_flags);
+ trace_nfs_create_exit(dir, dentry, open_flags, error);
if (error != 0)
goto out_err;
return 0;
@@ -1624,7 +1644,9 @@ nfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
attr.ia_mode = mode;
attr.ia_valid = ATTR_MODE;
+ trace_nfs_mknod_enter(dir, dentry);
status = NFS_PROTO(dir)->mknod(dir, dentry, &attr, rdev);
+ trace_nfs_mknod_exit(dir, dentry, status);
if (status != 0)
goto out_err;
return 0;
@@ -1648,7 +1670,9 @@ int nfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
attr.ia_valid = ATTR_MODE;
attr.ia_mode = mode | S_IFDIR;
+ trace_nfs_mkdir_enter(dir, dentry);
error = NFS_PROTO(dir)->mkdir(dir, dentry, &attr);
+ trace_nfs_mkdir_exit(dir, dentry, error);
if (error != 0)
goto out_err;
return 0;
@@ -1671,12 +1695,21 @@ int nfs_rmdir(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: rmdir(%s/%ld), %s\n",
dir->i_sb->s_id, dir->i_ino, dentry->d_name.name);
- error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
- /* Ensure the VFS deletes this inode */
- if (error == 0 && dentry->d_inode != NULL)
- clear_nlink(dentry->d_inode);
- else if (error == -ENOENT)
- nfs_dentry_handle_enoent(dentry);
+ trace_nfs_rmdir_enter(dir, dentry);
+ if (dentry->d_inode) {
+ nfs_wait_on_sillyrename(dentry);
+ error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
+ /* Ensure the VFS deletes this inode */
+ switch (error) {
+ case 0:
+ clear_nlink(dentry->d_inode);
+ break;
+ case -ENOENT:
+ nfs_dentry_handle_enoent(dentry);
+ }
+ } else
+ error = NFS_PROTO(dir)->rmdir(dir, &dentry->d_name);
+ trace_nfs_rmdir_exit(dir, dentry, error);
return error;
}
@@ -1704,6 +1737,7 @@ static int nfs_safe_remove(struct dentry *dentry)
goto out;
}
+ trace_nfs_remove_enter(dir, dentry);
if (inode != NULL) {
NFS_PROTO(inode)->return_delegation(inode);
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
@@ -1713,6 +1747,7 @@ static int nfs_safe_remove(struct dentry *dentry)
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
if (error == -ENOENT)
nfs_dentry_handle_enoent(dentry);
+ trace_nfs_remove_exit(dir, dentry, error);
out:
return error;
}
@@ -1730,13 +1765,14 @@ int nfs_unlink(struct inode *dir, struct dentry *dentry)
dfprintk(VFS, "NFS: unlink(%s/%ld, %s)\n", dir->i_sb->s_id,
dir->i_ino, dentry->d_name.name);
+ trace_nfs_unlink_enter(dir, dentry);
spin_lock(&dentry->d_lock);
if (d_count(dentry) > 1) {
spin_unlock(&dentry->d_lock);
/* Start asynchronous writeout of the inode */
write_inode_now(dentry->d_inode, 0);
error = nfs_sillyrename(dir, dentry);
- return error;
+ goto out;
}
if (!d_unhashed(dentry)) {
__d_drop(dentry);
@@ -1748,6 +1784,8 @@ int nfs_unlink(struct inode *dir, struct dentry *dentry)
nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
} else if (need_rehash)
d_rehash(dentry);
+out:
+ trace_nfs_unlink_exit(dir, dentry, error);
return error;
}
EXPORT_SYMBOL_GPL(nfs_unlink);
@@ -1794,7 +1832,9 @@ int nfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
memset(kaddr + pathlen, 0, PAGE_SIZE - pathlen);
kunmap_atomic(kaddr);
+ trace_nfs_symlink_enter(dir, dentry);
error = NFS_PROTO(dir)->symlink(dir, dentry, page, pathlen, &attr);
+ trace_nfs_symlink_exit(dir, dentry, error);
if (error != 0) {
dfprintk(VFS, "NFS: symlink(%s/%ld, %s, %s) error %d\n",
dir->i_sb->s_id, dir->i_ino,
@@ -1829,6 +1869,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
old_dentry->d_parent->d_name.name, old_dentry->d_name.name,
dentry->d_parent->d_name.name, dentry->d_name.name);
+ trace_nfs_link_enter(inode, dir, dentry);
NFS_PROTO(inode)->return_delegation(inode);
d_drop(dentry);
@@ -1837,6 +1878,7 @@ nfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry)
ihold(inode);
d_add(dentry, inode);
}
+ trace_nfs_link_exit(inode, dir, dentry, error);
return error;
}
EXPORT_SYMBOL_GPL(nfs_link);
@@ -1878,6 +1920,7 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
new_dentry->d_parent->d_name.name, new_dentry->d_name.name,
d_count(new_dentry));
+ trace_nfs_rename_enter(old_dir, old_dentry, new_dir, new_dentry);
/*
* For non-directories, check whether the target is busy and if so,
* make a copy of the dentry and then do a silly-rename. If the
@@ -1924,6 +1967,8 @@ int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
out:
if (rehash)
d_rehash(rehash);
+ trace_nfs_rename_exit(old_dir, old_dentry,
+ new_dir, new_dentry, error);
if (!error) {
if (new_inode != NULL)
nfs_drop_nlink(new_inode);
@@ -1964,17 +2009,18 @@ static void nfs_access_free_list(struct list_head *head)
}
}
-int nfs_access_cache_shrinker(struct shrinker *shrink,
- struct shrink_control *sc)
+unsigned long
+nfs_access_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
{
LIST_HEAD(head);
struct nfs_inode *nfsi, *next;
struct nfs_access_entry *cache;
int nr_to_scan = sc->nr_to_scan;
gfp_t gfp_mask = sc->gfp_mask;
+ long freed = 0;
if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
- return (nr_to_scan == 0) ? 0 : -1;
+ return SHRINK_STOP;
spin_lock(&nfs_access_lru_lock);
list_for_each_entry_safe(nfsi, next, &nfs_access_lru_list, access_cache_inode_lru) {
@@ -1990,6 +2036,7 @@ int nfs_access_cache_shrinker(struct shrinker *shrink,
struct nfs_access_entry, lru);
list_move(&cache->lru, &head);
rb_erase(&cache->rb_node, &nfsi->access_cache);
+ freed++;
if (!list_empty(&nfsi->access_cache_entry_lru))
list_move_tail(&nfsi->access_cache_inode_lru,
&nfs_access_lru_list);
@@ -2004,7 +2051,13 @@ remove_lru_entry:
}
spin_unlock(&nfs_access_lru_lock);
nfs_access_free_list(&head);
- return (atomic_long_read(&nfs_access_nr_entries) / 100) * sysctl_vfs_cache_pressure;
+ return freed;
+}
+
+unsigned long
+nfs_access_cache_count(struct shrinker *shrink, struct shrink_control *sc)
+{
+ return vfs_pressure_ratio(atomic_long_read(&nfs_access_nr_entries));
}
static void __nfs_access_zap_cache(struct nfs_inode *nfsi, struct list_head *head)
@@ -2173,9 +2226,11 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
struct nfs_access_entry cache;
int status;
+ trace_nfs_access_enter(inode);
+
status = nfs_access_get_cached(inode, cred, &cache);
if (status == 0)
- goto out;
+ goto out_cached;
/* Be clever: ask server to check for all possible rights */
cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
@@ -2188,13 +2243,15 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask)
if (!S_ISDIR(inode->i_mode))
set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
}
- return status;
+ goto out;
}
nfs_access_add_cache(inode, &cache);
+out_cached:
+ if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0)
+ status = -EACCES;
out:
- if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0)
- return 0;
- return -EACCES;
+ trace_nfs_access_exit(inode, status);
+ return status;
}
static int nfs_open_permission_mask(int openflags)
@@ -2240,11 +2297,6 @@ int nfs_permission(struct inode *inode, int mask)
case S_IFLNK:
goto out;
case S_IFREG:
- /* NFSv4 has atomic_open... */
- if (nfs_server_capable(inode, NFS_CAP_ATOMIC_OPEN)
- && (mask & MAY_OPEN)
- && !(mask & MAY_EXEC))
- goto out;
break;
case S_IFDIR:
/*
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-28 12:47:20 +0000