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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 05:44:11 +00:00
ocfs2: Add extended attribute support
This patch implements storing extended attributes both in inode or a single external block. We only store EA's in-inode when blocksize > 512 or that inode block has free space for it. When an EA's value is larger than 80 bytes, we will store the value via b-tree outside inode or block. Signed-off-by: Tiger Yang <tiger.yang@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
parent
fdd77704a8
commit
cf1d6c763f
16 changed files with 1927 additions and 6 deletions
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@ -36,6 +36,8 @@ ocfs2-objs := \
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uptodate.o \
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uptodate.o \
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ver.o \
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ver.o \
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xattr.o \
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xattr.o \
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xattr_user.o \
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xattr_trusted.o
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ocfs2_stackglue-objs := stackglue.o
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ocfs2_stackglue-objs := stackglue.o
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ocfs2_stack_o2cb-objs := stack_o2cb.o
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ocfs2_stack_o2cb-objs := stack_o2cb.o
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@ -55,6 +55,7 @@
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#include "mmap.h"
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#include "mmap.h"
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#include "suballoc.h"
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#include "suballoc.h"
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#include "super.h"
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#include "super.h"
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#include "xattr.h"
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#include "buffer_head_io.h"
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#include "buffer_head_io.h"
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@ -2070,6 +2071,10 @@ const struct inode_operations ocfs2_file_iops = {
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.setattr = ocfs2_setattr,
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.setattr = ocfs2_setattr,
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.getattr = ocfs2_getattr,
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.getattr = ocfs2_getattr,
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.permission = ocfs2_permission,
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.permission = ocfs2_permission,
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.listxattr = ocfs2_listxattr,
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.removexattr = generic_removexattr,
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.fallocate = ocfs2_fallocate,
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.fallocate = ocfs2_fallocate,
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.fiemap = ocfs2_fiemap,
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.fiemap = ocfs2_fiemap,
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};
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};
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@ -49,6 +49,7 @@
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#include "symlink.h"
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#include "symlink.h"
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#include "sysfile.h"
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#include "sysfile.h"
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#include "uptodate.h"
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#include "uptodate.h"
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#include "xattr.h"
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#include "buffer_head_io.h"
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#include "buffer_head_io.h"
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@ -741,6 +742,13 @@ static int ocfs2_wipe_inode(struct inode *inode,
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goto bail_unlock_dir;
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goto bail_unlock_dir;
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}
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}
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/*Free extended attribute resources associated with this inode.*/
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status = ocfs2_xattr_remove(inode, di_bh);
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if (status < 0) {
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mlog_errno(status);
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goto bail_unlock_dir;
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}
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status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
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status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
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orphan_dir_bh);
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orphan_dir_bh);
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if (status < 0)
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if (status < 0)
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@ -40,6 +40,9 @@ struct ocfs2_inode_info
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/* protects allocation changes on this inode. */
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/* protects allocation changes on this inode. */
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struct rw_semaphore ip_alloc_sem;
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struct rw_semaphore ip_alloc_sem;
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/* protects extended attribute changes on this inode */
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struct rw_semaphore ip_xattr_sem;
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/* These fields are protected by ip_lock */
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/* These fields are protected by ip_lock */
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spinlock_t ip_lock;
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spinlock_t ip_lock;
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u32 ip_open_count;
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u32 ip_open_count;
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@ -283,6 +283,9 @@ int ocfs2_journal_dirty_data(handle_t *handle,
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/* simple file updates like chmod, etc. */
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/* simple file updates like chmod, etc. */
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#define OCFS2_INODE_UPDATE_CREDITS 1
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#define OCFS2_INODE_UPDATE_CREDITS 1
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/* extended attribute block update */
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#define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
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/* group extend. inode update and last group update. */
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/* group extend. inode update and last group update. */
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#define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
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#define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
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@ -340,6 +343,13 @@ int ocfs2_journal_dirty_data(handle_t *handle,
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#define OCFS2_RENAME_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 3 \
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#define OCFS2_RENAME_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 3 \
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+ OCFS2_UNLINK_CREDITS)
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+ OCFS2_UNLINK_CREDITS)
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/* global bitmap dinode, group desc., relinked group,
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* suballocator dinode, group desc., relinked group,
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* dinode, xattr block */
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#define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
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+ OCFS2_INODE_UPDATE_CREDITS \
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+ OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
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/*
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/*
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* Please note that the caller must make sure that root_el is the root
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* Please note that the caller must make sure that root_el is the root
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* of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
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* of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
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@ -60,6 +60,7 @@
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#include "symlink.h"
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#include "symlink.h"
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#include "sysfile.h"
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#include "sysfile.h"
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#include "uptodate.h"
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#include "uptodate.h"
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#include "xattr.h"
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#include "buffer_head_io.h"
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#include "buffer_head_io.h"
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@ -1918,4 +1919,8 @@ const struct inode_operations ocfs2_dir_iops = {
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.setattr = ocfs2_setattr,
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.setattr = ocfs2_setattr,
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.getattr = ocfs2_getattr,
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.getattr = ocfs2_getattr,
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.permission = ocfs2_permission,
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.permission = ocfs2_permission,
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.listxattr = ocfs2_listxattr,
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.removexattr = generic_removexattr,
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};
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};
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@ -188,6 +188,7 @@ enum ocfs2_mount_options
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OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
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OCFS2_MOUNT_ERRORS_PANIC = 1 << 3, /* Panic on errors */
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OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
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OCFS2_MOUNT_DATA_WRITEBACK = 1 << 4, /* No data ordering */
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OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
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OCFS2_MOUNT_LOCALFLOCKS = 1 << 5, /* No cluster aware user file locks */
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OCFS2_MOUNT_NOUSERXATTR = 1 << 6, /* No user xattr */
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};
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};
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#define OCFS2_OSB_SOFT_RO 0x0001
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#define OCFS2_OSB_SOFT_RO 0x0001
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@ -218,6 +219,7 @@ struct ocfs2_super
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u32 bitmap_cpg;
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u32 bitmap_cpg;
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u8 *uuid;
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u8 *uuid;
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char *uuid_str;
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char *uuid_str;
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u32 uuid_hash;
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u8 *vol_label;
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u8 *vol_label;
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u64 first_cluster_group_blkno;
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u64 first_cluster_group_blkno;
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u32 fs_generation;
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u32 fs_generation;
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@ -570,7 +570,7 @@ struct ocfs2_super_block {
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/*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
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/*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
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before tunefs required */
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before tunefs required */
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__le16 s_tunefs_flag;
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__le16 s_tunefs_flag;
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__le32 s_reserved1;
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__le32 s_uuid_hash; /* hash value of uuid */
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__le64 s_first_cluster_group; /* Block offset of 1st cluster
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__le64 s_first_cluster_group; /* Block offset of 1st cluster
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* group header */
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* group header */
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/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
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/*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
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@ -788,6 +788,10 @@ struct ocfs2_xattr_tree_root {
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};
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};
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#define OCFS2_XATTR_INDEXED 0x1
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#define OCFS2_XATTR_INDEXED 0x1
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#define OCFS2_HASH_SHIFT 5
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#define OCFS2_XATTR_ROUND 3
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#define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \
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~(OCFS2_XATTR_ROUND))
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/*
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/*
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* On disk structure for xattr block.
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* On disk structure for xattr block.
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@ -493,8 +493,8 @@ static int ocfs2_reserve_suballoc_bits(struct ocfs2_super *osb,
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return status;
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return status;
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}
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}
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int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
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int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
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struct ocfs2_extent_list *root_el,
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int blocks,
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struct ocfs2_alloc_context **ac)
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struct ocfs2_alloc_context **ac)
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{
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{
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int status;
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int status;
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goto bail;
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goto bail;
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}
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}
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(*ac)->ac_bits_wanted = ocfs2_extend_meta_needed(root_el);
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(*ac)->ac_bits_wanted = blocks;
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(*ac)->ac_which = OCFS2_AC_USE_META;
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(*ac)->ac_which = OCFS2_AC_USE_META;
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slot = osb->slot_num;
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slot = osb->slot_num;
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(*ac)->ac_group_search = ocfs2_block_group_search;
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(*ac)->ac_group_search = ocfs2_block_group_search;
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return status;
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return status;
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}
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}
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int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
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struct ocfs2_extent_list *root_el,
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struct ocfs2_alloc_context **ac)
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{
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return ocfs2_reserve_new_metadata_blocks(osb,
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ocfs2_extend_meta_needed(root_el),
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ac);
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}
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static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb,
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static int ocfs2_steal_inode_from_other_nodes(struct ocfs2_super *osb,
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struct ocfs2_alloc_context *ac)
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struct ocfs2_alloc_context *ac)
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{
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{
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@ -67,6 +67,9 @@ static inline int ocfs2_alloc_context_bits_left(struct ocfs2_alloc_context *ac)
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int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
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int ocfs2_reserve_new_metadata(struct ocfs2_super *osb,
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struct ocfs2_extent_list *root_el,
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struct ocfs2_extent_list *root_el,
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struct ocfs2_alloc_context **ac);
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struct ocfs2_alloc_context **ac);
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int ocfs2_reserve_new_metadata_blocks(struct ocfs2_super *osb,
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int blocks,
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struct ocfs2_alloc_context **ac);
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int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
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int ocfs2_reserve_new_inode(struct ocfs2_super *osb,
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struct ocfs2_alloc_context **ac);
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struct ocfs2_alloc_context **ac);
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int ocfs2_reserve_clusters(struct ocfs2_super *osb,
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int ocfs2_reserve_clusters(struct ocfs2_super *osb,
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@ -64,6 +64,7 @@
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#include "sysfile.h"
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#include "sysfile.h"
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#include "uptodate.h"
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#include "uptodate.h"
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#include "ver.h"
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#include "ver.h"
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#include "xattr.h"
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#include "buffer_head_io.h"
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#include "buffer_head_io.h"
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@ -154,6 +155,8 @@ enum {
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Opt_localalloc,
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Opt_localalloc,
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Opt_localflocks,
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Opt_localflocks,
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Opt_stack,
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Opt_stack,
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Opt_user_xattr,
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Opt_nouser_xattr,
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Opt_err,
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Opt_err,
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};
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};
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@ -173,6 +176,8 @@ static const match_table_t tokens = {
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{Opt_localalloc, "localalloc=%d"},
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{Opt_localalloc, "localalloc=%d"},
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{Opt_localflocks, "localflocks"},
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{Opt_localflocks, "localflocks"},
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{Opt_stack, "cluster_stack=%s"},
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{Opt_stack, "cluster_stack=%s"},
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{Opt_user_xattr, "user_xattr"},
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{Opt_nouser_xattr, "nouser_xattr"},
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{Opt_err, NULL}
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{Opt_err, NULL}
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};
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};
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@ -848,6 +853,12 @@ static int ocfs2_parse_options(struct super_block *sb,
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case Opt_data_writeback:
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case Opt_data_writeback:
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mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
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mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
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break;
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break;
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case Opt_user_xattr:
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mopt->mount_opt &= ~OCFS2_MOUNT_NOUSERXATTR;
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break;
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case Opt_nouser_xattr:
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mopt->mount_opt |= OCFS2_MOUNT_NOUSERXATTR;
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break;
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case Opt_atime_quantum:
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case Opt_atime_quantum:
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if (match_int(&args[0], &option)) {
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if (match_int(&args[0], &option)) {
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status = 0;
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status = 0;
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@ -1135,6 +1146,7 @@ static void ocfs2_inode_init_once(void *data)
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oi->ip_dir_start_lookup = 0;
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oi->ip_dir_start_lookup = 0;
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init_rwsem(&oi->ip_alloc_sem);
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init_rwsem(&oi->ip_alloc_sem);
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init_rwsem(&oi->ip_xattr_sem);
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mutex_init(&oi->ip_io_mutex);
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mutex_init(&oi->ip_io_mutex);
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oi->ip_blkno = 0ULL;
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oi->ip_blkno = 0ULL;
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@ -1378,6 +1390,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
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sb->s_fs_info = osb;
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sb->s_fs_info = osb;
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sb->s_op = &ocfs2_sops;
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sb->s_op = &ocfs2_sops;
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sb->s_export_op = &ocfs2_export_ops;
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sb->s_export_op = &ocfs2_export_ops;
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sb->s_xattr = ocfs2_xattr_handlers;
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sb->s_time_gran = 1;
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sb->s_time_gran = 1;
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sb->s_flags |= MS_NOATIME;
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sb->s_flags |= MS_NOATIME;
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/* this is needed to support O_LARGEFILE */
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/* this is needed to support O_LARGEFILE */
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@ -1574,6 +1587,7 @@ static int ocfs2_initialize_super(struct super_block *sb,
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osb->first_cluster_group_blkno =
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osb->first_cluster_group_blkno =
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le64_to_cpu(di->id2.i_super.s_first_cluster_group);
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le64_to_cpu(di->id2.i_super.s_first_cluster_group);
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osb->fs_generation = le32_to_cpu(di->i_fs_generation);
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osb->fs_generation = le32_to_cpu(di->i_fs_generation);
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osb->uuid_hash = le32_to_cpu(di->id2.i_super.s_uuid_hash);
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mlog(0, "vol_label: %s\n", osb->vol_label);
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mlog(0, "vol_label: %s\n", osb->vol_label);
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mlog(0, "uuid: %s\n", osb->uuid_str);
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mlog(0, "uuid: %s\n", osb->uuid_str);
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mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
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mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n",
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@ -50,6 +50,7 @@
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#include "inode.h"
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#include "inode.h"
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#include "journal.h"
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#include "journal.h"
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#include "symlink.h"
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#include "symlink.h"
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#include "xattr.h"
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#include "buffer_head_io.h"
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#include "buffer_head_io.h"
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@ -168,10 +169,18 @@ const struct inode_operations ocfs2_symlink_inode_operations = {
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.follow_link = ocfs2_follow_link,
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.follow_link = ocfs2_follow_link,
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.getattr = ocfs2_getattr,
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.getattr = ocfs2_getattr,
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.setattr = ocfs2_setattr,
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.setattr = ocfs2_setattr,
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.setxattr = generic_setxattr,
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.getxattr = generic_getxattr,
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.listxattr = ocfs2_listxattr,
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.removexattr = generic_removexattr,
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||||||
};
|
};
|
||||||
const struct inode_operations ocfs2_fast_symlink_inode_operations = {
|
const struct inode_operations ocfs2_fast_symlink_inode_operations = {
|
||||||
.readlink = ocfs2_readlink,
|
.readlink = ocfs2_readlink,
|
||||||
.follow_link = ocfs2_follow_link,
|
.follow_link = ocfs2_follow_link,
|
||||||
.getattr = ocfs2_getattr,
|
.getattr = ocfs2_getattr,
|
||||||
.setattr = ocfs2_setattr,
|
.setattr = ocfs2_setattr,
|
||||||
|
.setxattr = generic_setxattr,
|
||||||
|
.getxattr = generic_getxattr,
|
||||||
|
.listxattr = ocfs2_listxattr,
|
||||||
|
.removexattr = generic_removexattr,
|
||||||
};
|
};
|
||||||
|
|
1620
fs/ocfs2/xattr.c
1620
fs/ocfs2/xattr.c
File diff suppressed because it is too large
Load diff
51
fs/ocfs2/xattr.h
Normal file
51
fs/ocfs2/xattr.h
Normal file
|
@ -0,0 +1,51 @@
|
||||||
|
/* -*- mode: c; c-basic-offset: 8; -*-
|
||||||
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
||||||
|
*
|
||||||
|
* xattr.h
|
||||||
|
*
|
||||||
|
* Function prototypes
|
||||||
|
*
|
||||||
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public
|
||||||
|
* License along with this program; if not, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 021110-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef OCFS2_XATTR_H
|
||||||
|
#define OCFS2_XATTR_H
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/xattr.h>
|
||||||
|
|
||||||
|
enum ocfs2_xattr_type {
|
||||||
|
OCFS2_XATTR_INDEX_USER = 1,
|
||||||
|
OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS,
|
||||||
|
OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT,
|
||||||
|
OCFS2_XATTR_INDEX_TRUSTED,
|
||||||
|
OCFS2_XATTR_INDEX_SECURITY,
|
||||||
|
OCFS2_XATTR_MAX
|
||||||
|
};
|
||||||
|
|
||||||
|
extern struct xattr_handler ocfs2_xattr_user_handler;
|
||||||
|
extern struct xattr_handler ocfs2_xattr_trusted_handler;
|
||||||
|
|
||||||
|
extern ssize_t ocfs2_listxattr(struct dentry *, char *, size_t);
|
||||||
|
extern int ocfs2_xattr_get(struct inode *, int, const char *, void *, size_t);
|
||||||
|
extern int ocfs2_xattr_set(struct inode *, int, const char *, const void *,
|
||||||
|
size_t, int);
|
||||||
|
extern int ocfs2_xattr_remove(struct inode *inode, struct buffer_head *di_bh);
|
||||||
|
extern struct xattr_handler *ocfs2_xattr_handlers[];
|
||||||
|
|
||||||
|
#endif /* OCFS2_XATTR_H */
|
82
fs/ocfs2/xattr_trusted.c
Normal file
82
fs/ocfs2/xattr_trusted.c
Normal file
|
@ -0,0 +1,82 @@
|
||||||
|
/* -*- mode: c; c-basic-offset: 8; -*-
|
||||||
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
||||||
|
*
|
||||||
|
* xattr_trusted.c
|
||||||
|
*
|
||||||
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
||||||
|
*
|
||||||
|
* CREDITS:
|
||||||
|
* Lots of code in this file is taken from ext3.
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public
|
||||||
|
* License along with this program; if not, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 021110-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/string.h>
|
||||||
|
|
||||||
|
#define MLOG_MASK_PREFIX ML_INODE
|
||||||
|
#include <cluster/masklog.h>
|
||||||
|
|
||||||
|
#include "ocfs2.h"
|
||||||
|
#include "alloc.h"
|
||||||
|
#include "dlmglue.h"
|
||||||
|
#include "file.h"
|
||||||
|
#include "ocfs2_fs.h"
|
||||||
|
#include "xattr.h"
|
||||||
|
|
||||||
|
#define XATTR_TRUSTED_PREFIX "trusted."
|
||||||
|
|
||||||
|
static size_t ocfs2_xattr_trusted_list(struct inode *inode, char *list,
|
||||||
|
size_t list_size, const char *name,
|
||||||
|
size_t name_len)
|
||||||
|
{
|
||||||
|
const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX) - 1;
|
||||||
|
const size_t total_len = prefix_len + name_len + 1;
|
||||||
|
|
||||||
|
if (list && total_len <= list_size) {
|
||||||
|
memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
|
||||||
|
memcpy(list + prefix_len, name, name_len);
|
||||||
|
list[prefix_len + name_len] = '\0';
|
||||||
|
}
|
||||||
|
return total_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ocfs2_xattr_trusted_get(struct inode *inode, const char *name,
|
||||||
|
void *buffer, size_t size)
|
||||||
|
{
|
||||||
|
if (strcmp(name, "") == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_TRUSTED, name,
|
||||||
|
buffer, size);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ocfs2_xattr_trusted_set(struct inode *inode, const char *name,
|
||||||
|
const void *value, size_t size, int flags)
|
||||||
|
{
|
||||||
|
if (strcmp(name, "") == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_TRUSTED, name, value,
|
||||||
|
size, flags);
|
||||||
|
}
|
||||||
|
|
||||||
|
struct xattr_handler ocfs2_xattr_trusted_handler = {
|
||||||
|
.prefix = XATTR_TRUSTED_PREFIX,
|
||||||
|
.list = ocfs2_xattr_trusted_list,
|
||||||
|
.get = ocfs2_xattr_trusted_get,
|
||||||
|
.set = ocfs2_xattr_trusted_set,
|
||||||
|
};
|
94
fs/ocfs2/xattr_user.c
Normal file
94
fs/ocfs2/xattr_user.c
Normal file
|
@ -0,0 +1,94 @@
|
||||||
|
/* -*- mode: c; c-basic-offset: 8; -*-
|
||||||
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
||||||
|
*
|
||||||
|
* xattr_user.c
|
||||||
|
*
|
||||||
|
* Copyright (C) 2008 Oracle. All rights reserved.
|
||||||
|
*
|
||||||
|
* CREDITS:
|
||||||
|
* Lots of code in this file is taken from ext3.
|
||||||
|
*
|
||||||
|
* This program is free software; you can redistribute it and/or
|
||||||
|
* modify it under the terms of the GNU General Public
|
||||||
|
* License as published by the Free Software Foundation; either
|
||||||
|
* version 2 of the License, or (at your option) any later version.
|
||||||
|
*
|
||||||
|
* This program is distributed in the hope that it will be useful,
|
||||||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||||
|
* General Public License for more details.
|
||||||
|
*
|
||||||
|
* You should have received a copy of the GNU General Public
|
||||||
|
* License along with this program; if not, write to the
|
||||||
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||||||
|
* Boston, MA 021110-1307, USA.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <linux/init.h>
|
||||||
|
#include <linux/module.h>
|
||||||
|
#include <linux/string.h>
|
||||||
|
|
||||||
|
#define MLOG_MASK_PREFIX ML_INODE
|
||||||
|
#include <cluster/masklog.h>
|
||||||
|
|
||||||
|
#include "ocfs2.h"
|
||||||
|
#include "alloc.h"
|
||||||
|
#include "dlmglue.h"
|
||||||
|
#include "file.h"
|
||||||
|
#include "ocfs2_fs.h"
|
||||||
|
#include "xattr.h"
|
||||||
|
|
||||||
|
#define XATTR_USER_PREFIX "user."
|
||||||
|
|
||||||
|
static size_t ocfs2_xattr_user_list(struct inode *inode, char *list,
|
||||||
|
size_t list_size, const char *name,
|
||||||
|
size_t name_len)
|
||||||
|
{
|
||||||
|
const size_t prefix_len = sizeof(XATTR_USER_PREFIX) - 1;
|
||||||
|
const size_t total_len = prefix_len + name_len + 1;
|
||||||
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
||||||
|
|
||||||
|
if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
if (list && total_len <= list_size) {
|
||||||
|
memcpy(list, XATTR_USER_PREFIX, prefix_len);
|
||||||
|
memcpy(list + prefix_len, name, name_len);
|
||||||
|
list[prefix_len + name_len] = '\0';
|
||||||
|
}
|
||||||
|
return total_len;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ocfs2_xattr_user_get(struct inode *inode, const char *name,
|
||||||
|
void *buffer, size_t size)
|
||||||
|
{
|
||||||
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
||||||
|
|
||||||
|
if (strcmp(name, "") == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
|
||||||
|
return -EOPNOTSUPP;
|
||||||
|
return ocfs2_xattr_get(inode, OCFS2_XATTR_INDEX_USER, name,
|
||||||
|
buffer, size);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int ocfs2_xattr_user_set(struct inode *inode, const char *name,
|
||||||
|
const void *value, size_t size, int flags)
|
||||||
|
{
|
||||||
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
||||||
|
|
||||||
|
if (strcmp(name, "") == 0)
|
||||||
|
return -EINVAL;
|
||||||
|
if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
|
||||||
|
return -EOPNOTSUPP;
|
||||||
|
|
||||||
|
return ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_USER, name, value,
|
||||||
|
size, flags);
|
||||||
|
}
|
||||||
|
|
||||||
|
struct xattr_handler ocfs2_xattr_user_handler = {
|
||||||
|
.prefix = XATTR_USER_PREFIX,
|
||||||
|
.list = ocfs2_xattr_user_list,
|
||||||
|
.get = ocfs2_xattr_user_get,
|
||||||
|
.set = ocfs2_xattr_user_set,
|
||||||
|
};
|
Loading…
Reference in a new issue