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Diffstat (limited to 'fs/ceph/dir.c')
-rw-r--r--fs/ceph/dir.c205
1 files changed, 112 insertions, 93 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index f1d9c6cc0491..1a78dd6f8bf2 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -2,7 +2,6 @@
#include <linux/ceph/ceph_debug.h>
#include <linux/spinlock.h>
-#include <linux/fs_struct.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/sched.h>
@@ -102,18 +101,18 @@ static int fpos_cmp(loff_t l, loff_t r)
* regardless of what dir changes take place on the
* server.
*/
-static int note_last_dentry(struct ceph_file_info *fi, const char *name,
+static int note_last_dentry(struct ceph_dir_file_info *dfi, const char *name,
int len, unsigned next_offset)
{
char *buf = kmalloc(len+1, GFP_KERNEL);
if (!buf)
return -ENOMEM;
- kfree(fi->last_name);
- fi->last_name = buf;
- memcpy(fi->last_name, name, len);
- fi->last_name[len] = 0;
- fi->next_offset = next_offset;
- dout("note_last_dentry '%s'\n", fi->last_name);
+ kfree(dfi->last_name);
+ dfi->last_name = buf;
+ memcpy(dfi->last_name, name, len);
+ dfi->last_name[len] = 0;
+ dfi->next_offset = next_offset;
+ dout("note_last_dentry '%s'\n", dfi->last_name);
return 0;
}
@@ -175,7 +174,7 @@ __dcache_find_get_entry(struct dentry *parent, u64 idx,
static int __dcache_readdir(struct file *file, struct dir_context *ctx,
int shared_gen)
{
- struct ceph_file_info *fi = file->private_data;
+ struct ceph_dir_file_info *dfi = file->private_data;
struct dentry *parent = file->f_path.dentry;
struct inode *dir = d_inode(parent);
struct dentry *dentry, *last = NULL;
@@ -222,7 +221,7 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx,
bool emit_dentry = false;
dentry = __dcache_find_get_entry(parent, idx++, &cache_ctl);
if (!dentry) {
- fi->flags |= CEPH_F_ATEND;
+ dfi->file_info.flags |= CEPH_F_ATEND;
err = 0;
break;
}
@@ -273,33 +272,33 @@ out:
if (last) {
int ret;
di = ceph_dentry(last);
- ret = note_last_dentry(fi, last->d_name.name, last->d_name.len,
+ ret = note_last_dentry(dfi, last->d_name.name, last->d_name.len,
fpos_off(di->offset) + 1);
if (ret < 0)
err = ret;
dput(last);
/* last_name no longer match cache index */
- if (fi->readdir_cache_idx >= 0) {
- fi->readdir_cache_idx = -1;
- fi->dir_release_count = 0;
+ if (dfi->readdir_cache_idx >= 0) {
+ dfi->readdir_cache_idx = -1;
+ dfi->dir_release_count = 0;
}
}
return err;
}
-static bool need_send_readdir(struct ceph_file_info *fi, loff_t pos)
+static bool need_send_readdir(struct ceph_dir_file_info *dfi, loff_t pos)
{
- if (!fi->last_readdir)
+ if (!dfi->last_readdir)
return true;
if (is_hash_order(pos))
- return !ceph_frag_contains_value(fi->frag, fpos_hash(pos));
+ return !ceph_frag_contains_value(dfi->frag, fpos_hash(pos));
else
- return fi->frag != fpos_frag(pos);
+ return dfi->frag != fpos_frag(pos);
}
static int ceph_readdir(struct file *file, struct dir_context *ctx)
{
- struct ceph_file_info *fi = file->private_data;
+ struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
@@ -310,7 +309,7 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
struct ceph_mds_reply_info_parsed *rinfo;
dout("readdir %p file %p pos %llx\n", inode, file, ctx->pos);
- if (fi->flags & CEPH_F_ATEND)
+ if (dfi->file_info.flags & CEPH_F_ATEND)
return 0;
/* always start with . and .. */
@@ -351,15 +350,15 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
/* proceed with a normal readdir */
more:
/* do we have the correct frag content buffered? */
- if (need_send_readdir(fi, ctx->pos)) {
+ if (need_send_readdir(dfi, ctx->pos)) {
struct ceph_mds_request *req;
int op = ceph_snap(inode) == CEPH_SNAPDIR ?
CEPH_MDS_OP_LSSNAP : CEPH_MDS_OP_READDIR;
/* discard old result, if any */
- if (fi->last_readdir) {
- ceph_mdsc_put_request(fi->last_readdir);
- fi->last_readdir = NULL;
+ if (dfi->last_readdir) {
+ ceph_mdsc_put_request(dfi->last_readdir);
+ dfi->last_readdir = NULL;
}
if (is_hash_order(ctx->pos)) {
@@ -373,7 +372,7 @@ more:
}
dout("readdir fetching %llx.%llx frag %x offset '%s'\n",
- ceph_vinop(inode), frag, fi->last_name);
+ ceph_vinop(inode), frag, dfi->last_name);
req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
if (IS_ERR(req))
return PTR_ERR(req);
@@ -389,8 +388,8 @@ more:
__set_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags);
req->r_inode_drop = CEPH_CAP_FILE_EXCL;
}
- if (fi->last_name) {
- req->r_path2 = kstrdup(fi->last_name, GFP_KERNEL);
+ if (dfi->last_name) {
+ req->r_path2 = kstrdup(dfi->last_name, GFP_KERNEL);
if (!req->r_path2) {
ceph_mdsc_put_request(req);
return -ENOMEM;
@@ -400,10 +399,10 @@ more:
cpu_to_le32(fpos_hash(ctx->pos));
}
- req->r_dir_release_cnt = fi->dir_release_count;
- req->r_dir_ordered_cnt = fi->dir_ordered_count;
- req->r_readdir_cache_idx = fi->readdir_cache_idx;
- req->r_readdir_offset = fi->next_offset;
+ req->r_dir_release_cnt = dfi->dir_release_count;
+ req->r_dir_ordered_cnt = dfi->dir_ordered_count;
+ req->r_readdir_cache_idx = dfi->readdir_cache_idx;
+ req->r_readdir_offset = dfi->next_offset;
req->r_args.readdir.frag = cpu_to_le32(frag);
req->r_args.readdir.flags =
cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS);
@@ -427,35 +426,35 @@ more:
if (le32_to_cpu(rinfo->dir_dir->frag) != frag) {
frag = le32_to_cpu(rinfo->dir_dir->frag);
if (!rinfo->hash_order) {
- fi->next_offset = req->r_readdir_offset;
+ dfi->next_offset = req->r_readdir_offset;
/* adjust ctx->pos to beginning of frag */
ctx->pos = ceph_make_fpos(frag,
- fi->next_offset,
+ dfi->next_offset,
false);
}
}
- fi->frag = frag;
- fi->last_readdir = req;
+ dfi->frag = frag;
+ dfi->last_readdir = req;
if (test_bit(CEPH_MDS_R_DID_PREPOPULATE, &req->r_req_flags)) {
- fi->readdir_cache_idx = req->r_readdir_cache_idx;
- if (fi->readdir_cache_idx < 0) {
+ dfi->readdir_cache_idx = req->r_readdir_cache_idx;
+ if (dfi->readdir_cache_idx < 0) {
/* preclude from marking dir ordered */
- fi->dir_ordered_count = 0;
+ dfi->dir_ordered_count = 0;
} else if (ceph_frag_is_leftmost(frag) &&
- fi->next_offset == 2) {
+ dfi->next_offset == 2) {
/* note dir version at start of readdir so
* we can tell if any dentries get dropped */
- fi->dir_release_count = req->r_dir_release_cnt;
- fi->dir_ordered_count = req->r_dir_ordered_cnt;
+ dfi->dir_release_count = req->r_dir_release_cnt;
+ dfi->dir_ordered_count = req->r_dir_ordered_cnt;
}
} else {
- dout("readdir !did_prepopulate");
+ dout("readdir !did_prepopulate\n");
/* disable readdir cache */
- fi->readdir_cache_idx = -1;
+ dfi->readdir_cache_idx = -1;
/* preclude from marking dir complete */
- fi->dir_release_count = 0;
+ dfi->dir_release_count = 0;
}
/* note next offset and last dentry name */
@@ -464,19 +463,19 @@ more:
rinfo->dir_entries + (rinfo->dir_nr-1);
unsigned next_offset = req->r_reply_info.dir_end ?
2 : (fpos_off(rde->offset) + 1);
- err = note_last_dentry(fi, rde->name, rde->name_len,
+ err = note_last_dentry(dfi, rde->name, rde->name_len,
next_offset);
if (err)
return err;
} else if (req->r_reply_info.dir_end) {
- fi->next_offset = 2;
+ dfi->next_offset = 2;
/* keep last name */
}
}
- rinfo = &fi->last_readdir->r_reply_info;
+ rinfo = &dfi->last_readdir->r_reply_info;
dout("readdir frag %x num %d pos %llx chunk first %llx\n",
- fi->frag, rinfo->dir_nr, ctx->pos,
+ dfi->frag, rinfo->dir_nr, ctx->pos,
rinfo->dir_nr ? rinfo->dir_entries[0].offset : 0LL);
i = 0;
@@ -520,52 +519,55 @@ more:
ctx->pos++;
}
- ceph_mdsc_put_request(fi->last_readdir);
- fi->last_readdir = NULL;
+ ceph_mdsc_put_request(dfi->last_readdir);
+ dfi->last_readdir = NULL;
- if (fi->next_offset > 2) {
- frag = fi->frag;
+ if (dfi->next_offset > 2) {
+ frag = dfi->frag;
goto more;
}
/* more frags? */
- if (!ceph_frag_is_rightmost(fi->frag)) {
- frag = ceph_frag_next(fi->frag);
+ if (!ceph_frag_is_rightmost(dfi->frag)) {
+ frag = ceph_frag_next(dfi->frag);
if (is_hash_order(ctx->pos)) {
loff_t new_pos = ceph_make_fpos(ceph_frag_value(frag),
- fi->next_offset, true);
+ dfi->next_offset, true);
if (new_pos > ctx->pos)
ctx->pos = new_pos;
/* keep last_name */
} else {
- ctx->pos = ceph_make_fpos(frag, fi->next_offset, false);
- kfree(fi->last_name);
- fi->last_name = NULL;
+ ctx->pos = ceph_make_fpos(frag, dfi->next_offset,
+ false);
+ kfree(dfi->last_name);
+ dfi->last_name = NULL;
}
dout("readdir next frag is %x\n", frag);
goto more;
}
- fi->flags |= CEPH_F_ATEND;
+ dfi->file_info.flags |= CEPH_F_ATEND;
/*
* if dir_release_count still matches the dir, no dentries
* were released during the whole readdir, and we should have
* the complete dir contents in our cache.
*/
- if (atomic64_read(&ci->i_release_count) == fi->dir_release_count) {
+ if (atomic64_read(&ci->i_release_count) ==
+ dfi->dir_release_count) {
spin_lock(&ci->i_ceph_lock);
- if (fi->dir_ordered_count == atomic64_read(&ci->i_ordered_count)) {
+ if (dfi->dir_ordered_count ==
+ atomic64_read(&ci->i_ordered_count)) {
dout(" marking %p complete and ordered\n", inode);
/* use i_size to track number of entries in
* readdir cache */
- BUG_ON(fi->readdir_cache_idx < 0);
- i_size_write(inode, fi->readdir_cache_idx *
+ BUG_ON(dfi->readdir_cache_idx < 0);
+ i_size_write(inode, dfi->readdir_cache_idx *
sizeof(struct dentry*));
} else {
dout(" marking %p complete\n", inode);
}
- __ceph_dir_set_complete(ci, fi->dir_release_count,
- fi->dir_ordered_count);
+ __ceph_dir_set_complete(ci, dfi->dir_release_count,
+ dfi->dir_ordered_count);
spin_unlock(&ci->i_ceph_lock);
}
@@ -573,25 +575,25 @@ more:
return 0;
}
-static void reset_readdir(struct ceph_file_info *fi)
+static void reset_readdir(struct ceph_dir_file_info *dfi)
{
- if (fi->last_readdir) {
- ceph_mdsc_put_request(fi->last_readdir);
- fi->last_readdir = NULL;
+ if (dfi->last_readdir) {
+ ceph_mdsc_put_request(dfi->last_readdir);
+ dfi->last_readdir = NULL;
}
- kfree(fi->last_name);
- fi->last_name = NULL;
- fi->dir_release_count = 0;
- fi->readdir_cache_idx = -1;
- fi->next_offset = 2; /* compensate for . and .. */
- fi->flags &= ~CEPH_F_ATEND;
+ kfree(dfi->last_name);
+ dfi->last_name = NULL;
+ dfi->dir_release_count = 0;
+ dfi->readdir_cache_idx = -1;
+ dfi->next_offset = 2; /* compensate for . and .. */
+ dfi->file_info.flags &= ~CEPH_F_ATEND;
}
/*
* discard buffered readdir content on seekdir(0), or seek to new frag,
* or seek prior to current chunk
*/
-static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
+static bool need_reset_readdir(struct ceph_dir_file_info *dfi, loff_t new_pos)
{
struct ceph_mds_reply_info_parsed *rinfo;
loff_t chunk_offset;
@@ -600,10 +602,10 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
if (is_hash_order(new_pos)) {
/* no need to reset last_name for a forward seek when
* dentries are sotred in hash order */
- } else if (fi->frag != fpos_frag(new_pos)) {
+ } else if (dfi->frag != fpos_frag(new_pos)) {
return true;
}
- rinfo = fi->last_readdir ? &fi->last_readdir->r_reply_info : NULL;
+ rinfo = dfi->last_readdir ? &dfi->last_readdir->r_reply_info : NULL;
if (!rinfo || !rinfo->dir_nr)
return true;
chunk_offset = rinfo->dir_entries[0].offset;
@@ -613,7 +615,7 @@ static bool need_reset_readdir(struct ceph_file_info *fi, loff_t new_pos)
static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence)
{
- struct ceph_file_info *fi = file->private_data;
+ struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file->f_mapping->host;
loff_t retval;
@@ -631,20 +633,20 @@ static loff_t ceph_dir_llseek(struct file *file, loff_t offset, int whence)
}
if (offset >= 0) {
- if (need_reset_readdir(fi, offset)) {
+ if (need_reset_readdir(dfi, offset)) {
dout("dir_llseek dropping %p content\n", file);
- reset_readdir(fi);
+ reset_readdir(dfi);
} else if (is_hash_order(offset) && offset > file->f_pos) {
/* for hash offset, we don't know if a forward seek
* is within same frag */
- fi->dir_release_count = 0;
- fi->readdir_cache_idx = -1;
+ dfi->dir_release_count = 0;
+ dfi->readdir_cache_idx = -1;
}
if (offset != file->f_pos) {
file->f_pos = offset;
file->f_version = 0;
- fi->flags &= ~CEPH_F_ATEND;
+ dfi->file_info.flags &= ~CEPH_F_ATEND;
}
retval = offset;
}
@@ -825,6 +827,9 @@ static int ceph_mknod(struct inode *dir, struct dentry *dentry,
if (ceph_snap(dir) != CEPH_NOSNAP)
return -EROFS;
+ if (ceph_quota_is_max_files_exceeded(dir))
+ return -EDQUOT;
+
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
return err;
@@ -878,6 +883,9 @@ static int ceph_symlink(struct inode *dir, struct dentry *dentry,
if (ceph_snap(dir) != CEPH_NOSNAP)
return -EROFS;
+ if (ceph_quota_is_max_files_exceeded(dir))
+ return -EDQUOT;
+
dout("symlink in dir %p dentry %p to '%s'\n", dir, dentry, dest);
req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_SYMLINK, USE_AUTH_MDS);
if (IS_ERR(req)) {
@@ -927,6 +935,12 @@ static int ceph_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
goto out;
}
+ if (op == CEPH_MDS_OP_MKDIR &&
+ ceph_quota_is_max_files_exceeded(dir)) {
+ err = -EDQUOT;
+ goto out;
+ }
+
mode |= S_IFDIR;
err = ceph_pre_init_acls(dir, &mode, &acls);
if (err < 0)
@@ -1066,6 +1080,11 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
else
return -EROFS;
}
+ /* don't allow cross-quota renames */
+ if ((old_dir != new_dir) &&
+ (!ceph_quota_is_same_realm(old_dir, new_dir)))
+ return -EXDEV;
+
dout("rename dir %p dentry %p to dir %p dentry %p\n",
old_dir, old_dentry, new_dir, new_dentry);
req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);
@@ -1352,7 +1371,7 @@ static void ceph_d_prune(struct dentry *dentry)
static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
loff_t *ppos)
{
- struct ceph_file_info *cf = file->private_data;
+ struct ceph_dir_file_info *dfi = file->private_data;
struct inode *inode = file_inode(file);
struct ceph_inode_info *ci = ceph_inode(inode);
int left;
@@ -1361,12 +1380,12 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
if (!ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb), DIRSTAT))
return -EISDIR;
- if (!cf->dir_info) {
- cf->dir_info = kmalloc(bufsize, GFP_KERNEL);
- if (!cf->dir_info)
+ if (!dfi->dir_info) {
+ dfi->dir_info = kmalloc(bufsize, GFP_KERNEL);
+ if (!dfi->dir_info)
return -ENOMEM;
- cf->dir_info_len =
- snprintf(cf->dir_info, bufsize,
+ dfi->dir_info_len =
+ snprintf(dfi->dir_info, bufsize,
"entries: %20lld\n"
" files: %20lld\n"
" subdirs: %20lld\n"
@@ -1386,10 +1405,10 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
(long)ci->i_rctime.tv_nsec);
}
- if (*ppos >= cf->dir_info_len)
+ if (*ppos >= dfi->dir_info_len)
return 0;
- size = min_t(unsigned, size, cf->dir_info_len-*ppos);
- left = copy_to_user(buf, cf->dir_info + *ppos, size);
+ size = min_t(unsigned, size, dfi->dir_info_len-*ppos);
+ left = copy_to_user(buf, dfi->dir_info + *ppos, size);
if (left == size)
return -EFAULT;
*ppos += (size - left);
generated by cgit (git 2.34.1) at 2024-05-27 07:36:09 +0000