11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (C) International Business Machines Corp., 2000-2004 31da177e4SLinus Torvalds * Copyright (C) Christoph Hellwig, 2002 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 61da177e4SLinus Torvalds * it under the terms of the GNU General Public License as published by 71da177e4SLinus Torvalds * the Free Software Foundation; either version 2 of the License, or 81da177e4SLinus Torvalds * (at your option) any later version. 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * This program is distributed in the hope that it will be useful, 111da177e4SLinus Torvalds * but WITHOUT ANY WARRANTY; without even the implied warranty of 121da177e4SLinus Torvalds * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See 131da177e4SLinus Torvalds * the GNU General Public License for more details. 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License 161da177e4SLinus Torvalds * along with this program; if not, write to the Free Software 171da177e4SLinus Torvalds * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 181da177e4SLinus Torvalds */ 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds #include <linux/fs.h> 211da177e4SLinus Torvalds #include <linux/xattr.h> 229a59f452SChristoph Hellwig #include <linux/posix_acl_xattr.h> 231da177e4SLinus Torvalds #include <linux/quotaops.h> 241da177e4SLinus Torvalds #include "jfs_incore.h" 251da177e4SLinus Torvalds #include "jfs_superblock.h" 261da177e4SLinus Torvalds #include "jfs_dmap.h" 271da177e4SLinus Torvalds #include "jfs_debug.h" 281da177e4SLinus Torvalds #include "jfs_dinode.h" 291da177e4SLinus Torvalds #include "jfs_extent.h" 301da177e4SLinus Torvalds #include "jfs_metapage.h" 311da177e4SLinus Torvalds #include "jfs_xattr.h" 321da177e4SLinus Torvalds #include "jfs_acl.h" 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds /* 351da177e4SLinus Torvalds * jfs_xattr.c: extended attribute service 361da177e4SLinus Torvalds * 371da177e4SLinus Torvalds * Overall design -- 381da177e4SLinus Torvalds * 391da177e4SLinus Torvalds * Format: 401da177e4SLinus Torvalds * 411da177e4SLinus Torvalds * Extended attribute lists (jfs_ea_list) consist of an overall size (32 bit 421da177e4SLinus Torvalds * value) and a variable (0 or more) number of extended attribute 431da177e4SLinus Torvalds * entries. Each extended attribute entry (jfs_ea) is a <name,value> double 441da177e4SLinus Torvalds * where <name> is constructed from a null-terminated ascii string 451da177e4SLinus Torvalds * (1 ... 255 bytes in the name) and <value> is arbitrary 8 bit data 461da177e4SLinus Torvalds * (1 ... 65535 bytes). The in-memory format is 471da177e4SLinus Torvalds * 481da177e4SLinus Torvalds * 0 1 2 4 4 + namelen + 1 491da177e4SLinus Torvalds * +-------+--------+--------+----------------+-------------------+ 501da177e4SLinus Torvalds * | Flags | Name | Value | Name String \0 | Data . . . . | 511da177e4SLinus Torvalds * | | Length | Length | | | 521da177e4SLinus Torvalds * +-------+--------+--------+----------------+-------------------+ 531da177e4SLinus Torvalds * 541da177e4SLinus Torvalds * A jfs_ea_list then is structured as 551da177e4SLinus Torvalds * 561da177e4SLinus Torvalds * 0 4 4 + EA_SIZE(ea1) 571da177e4SLinus Torvalds * +------------+-------------------+--------------------+----- 581da177e4SLinus Torvalds * | Overall EA | First FEA Element | Second FEA Element | ..... 591da177e4SLinus Torvalds * | List Size | | | 601da177e4SLinus Torvalds * +------------+-------------------+--------------------+----- 611da177e4SLinus Torvalds * 621da177e4SLinus Torvalds * On-disk: 631da177e4SLinus Torvalds * 641da177e4SLinus Torvalds * FEALISTs are stored on disk using blocks allocated by dbAlloc() and 651da177e4SLinus Torvalds * written directly. An EA list may be in-lined in the inode if there is 661da177e4SLinus Torvalds * sufficient room available. 671da177e4SLinus Torvalds */ 681da177e4SLinus Torvalds 691da177e4SLinus Torvalds struct ea_buffer { 701da177e4SLinus Torvalds int flag; /* Indicates what storage xattr points to */ 711da177e4SLinus Torvalds int max_size; /* largest xattr that fits in current buffer */ 721da177e4SLinus Torvalds dxd_t new_ea; /* dxd to replace ea when modifying xattr */ 731da177e4SLinus Torvalds struct metapage *mp; /* metapage containing ea list */ 741da177e4SLinus Torvalds struct jfs_ea_list *xattr; /* buffer containing ea list */ 751da177e4SLinus Torvalds }; 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds /* 781da177e4SLinus Torvalds * ea_buffer.flag values 791da177e4SLinus Torvalds */ 801da177e4SLinus Torvalds #define EA_INLINE 0x0001 811da177e4SLinus Torvalds #define EA_EXTENT 0x0002 821da177e4SLinus Torvalds #define EA_NEW 0x0004 831da177e4SLinus Torvalds #define EA_MALLOC 0x0008 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds /* Namespaces */ 861da177e4SLinus Torvalds #define XATTR_SYSTEM_PREFIX "system." 871da177e4SLinus Torvalds #define XATTR_SYSTEM_PREFIX_LEN (sizeof (XATTR_SYSTEM_PREFIX) - 1) 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds #define XATTR_USER_PREFIX "user." 901da177e4SLinus Torvalds #define XATTR_USER_PREFIX_LEN (sizeof (XATTR_USER_PREFIX) - 1) 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds #define XATTR_OS2_PREFIX "os2." 931da177e4SLinus Torvalds #define XATTR_OS2_PREFIX_LEN (sizeof (XATTR_OS2_PREFIX) - 1) 941da177e4SLinus Torvalds 951da177e4SLinus Torvalds /* XATTR_SECURITY_PREFIX is defined in include/linux/xattr.h */ 961da177e4SLinus Torvalds #define XATTR_SECURITY_PREFIX_LEN (sizeof (XATTR_SECURITY_PREFIX) - 1) 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds #define XATTR_TRUSTED_PREFIX "trusted." 991da177e4SLinus Torvalds #define XATTR_TRUSTED_PREFIX_LEN (sizeof (XATTR_TRUSTED_PREFIX) - 1) 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds /* 1021da177e4SLinus Torvalds * These three routines are used to recognize on-disk extended attributes 1031da177e4SLinus Torvalds * that are in a recognized namespace. If the attribute is not recognized, 1041da177e4SLinus Torvalds * "os2." is prepended to the name 1051da177e4SLinus Torvalds */ 1061da177e4SLinus Torvalds static inline int is_os2_xattr(struct jfs_ea *ea) 1071da177e4SLinus Torvalds { 1081da177e4SLinus Torvalds /* 1091da177e4SLinus Torvalds * Check for "system." 1101da177e4SLinus Torvalds */ 1111da177e4SLinus Torvalds if ((ea->namelen >= XATTR_SYSTEM_PREFIX_LEN) && 1121da177e4SLinus Torvalds !strncmp(ea->name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN)) 1131da177e4SLinus Torvalds return FALSE; 1141da177e4SLinus Torvalds /* 1151da177e4SLinus Torvalds * Check for "user." 1161da177e4SLinus Torvalds */ 1171da177e4SLinus Torvalds if ((ea->namelen >= XATTR_USER_PREFIX_LEN) && 1181da177e4SLinus Torvalds !strncmp(ea->name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) 1191da177e4SLinus Torvalds return FALSE; 1201da177e4SLinus Torvalds /* 1211da177e4SLinus Torvalds * Check for "security." 1221da177e4SLinus Torvalds */ 1231da177e4SLinus Torvalds if ((ea->namelen >= XATTR_SECURITY_PREFIX_LEN) && 1241da177e4SLinus Torvalds !strncmp(ea->name, XATTR_SECURITY_PREFIX, 1251da177e4SLinus Torvalds XATTR_SECURITY_PREFIX_LEN)) 1261da177e4SLinus Torvalds return FALSE; 1271da177e4SLinus Torvalds /* 1281da177e4SLinus Torvalds * Check for "trusted." 1291da177e4SLinus Torvalds */ 1301da177e4SLinus Torvalds if ((ea->namelen >= XATTR_TRUSTED_PREFIX_LEN) && 1311da177e4SLinus Torvalds !strncmp(ea->name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN)) 1321da177e4SLinus Torvalds return FALSE; 1331da177e4SLinus Torvalds /* 1341da177e4SLinus Torvalds * Add any other valid namespace prefixes here 1351da177e4SLinus Torvalds */ 1361da177e4SLinus Torvalds 1371da177e4SLinus Torvalds /* 1381da177e4SLinus Torvalds * We assume it's OS/2's flat namespace 1391da177e4SLinus Torvalds */ 1401da177e4SLinus Torvalds return TRUE; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static inline int name_size(struct jfs_ea *ea) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds if (is_os2_xattr(ea)) 1461da177e4SLinus Torvalds return ea->namelen + XATTR_OS2_PREFIX_LEN; 1471da177e4SLinus Torvalds else 1481da177e4SLinus Torvalds return ea->namelen; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds 1511da177e4SLinus Torvalds static inline int copy_name(char *buffer, struct jfs_ea *ea) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds int len = ea->namelen; 1541da177e4SLinus Torvalds 1551da177e4SLinus Torvalds if (is_os2_xattr(ea)) { 1561da177e4SLinus Torvalds memcpy(buffer, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN); 1571da177e4SLinus Torvalds buffer += XATTR_OS2_PREFIX_LEN; 1581da177e4SLinus Torvalds len += XATTR_OS2_PREFIX_LEN; 1591da177e4SLinus Torvalds } 1601da177e4SLinus Torvalds memcpy(buffer, ea->name, ea->namelen); 1611da177e4SLinus Torvalds buffer[ea->namelen] = 0; 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds return len; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds /* Forward references */ 1671da177e4SLinus Torvalds static void ea_release(struct inode *inode, struct ea_buffer *ea_buf); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds /* 1701da177e4SLinus Torvalds * NAME: ea_write_inline 1711da177e4SLinus Torvalds * 1721da177e4SLinus Torvalds * FUNCTION: Attempt to write an EA inline if area is available 1731da177e4SLinus Torvalds * 1741da177e4SLinus Torvalds * PRE CONDITIONS: 1751da177e4SLinus Torvalds * Already verified that the specified EA is small enough to fit inline 1761da177e4SLinus Torvalds * 1771da177e4SLinus Torvalds * PARAMETERS: 1781da177e4SLinus Torvalds * ip - Inode pointer 1791da177e4SLinus Torvalds * ealist - EA list pointer 1801da177e4SLinus Torvalds * size - size of ealist in bytes 1811da177e4SLinus Torvalds * ea - dxd_t structure to be filled in with necessary EA information 1821da177e4SLinus Torvalds * if we successfully copy the EA inline 1831da177e4SLinus Torvalds * 1841da177e4SLinus Torvalds * NOTES: 1851da177e4SLinus Torvalds * Checks if the inode's inline area is available. If so, copies EA inline 1861da177e4SLinus Torvalds * and sets <ea> fields appropriately. Otherwise, returns failure, EA will 1871da177e4SLinus Torvalds * have to be put into an extent. 1881da177e4SLinus Torvalds * 1891da177e4SLinus Torvalds * RETURNS: 0 for successful copy to inline area; -1 if area not available 1901da177e4SLinus Torvalds */ 1911da177e4SLinus Torvalds static int ea_write_inline(struct inode *ip, struct jfs_ea_list *ealist, 1921da177e4SLinus Torvalds int size, dxd_t * ea) 1931da177e4SLinus Torvalds { 1941da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(ip); 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds /* 1971da177e4SLinus Torvalds * Make sure we have an EA -- the NULL EA list is valid, but you 1981da177e4SLinus Torvalds * can't copy it! 1991da177e4SLinus Torvalds */ 2001da177e4SLinus Torvalds if (ealist && size > sizeof (struct jfs_ea_list)) { 2011da177e4SLinus Torvalds assert(size <= sizeof (ji->i_inline_ea)); 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds /* 2041da177e4SLinus Torvalds * See if the space is available or if it is already being 2051da177e4SLinus Torvalds * used for an inline EA. 2061da177e4SLinus Torvalds */ 2071da177e4SLinus Torvalds if (!(ji->mode2 & INLINEEA) && !(ji->ea.flag & DXD_INLINE)) 2081da177e4SLinus Torvalds return -EPERM; 2091da177e4SLinus Torvalds 2101da177e4SLinus Torvalds DXDsize(ea, size); 2111da177e4SLinus Torvalds DXDlength(ea, 0); 2121da177e4SLinus Torvalds DXDaddress(ea, 0); 2131da177e4SLinus Torvalds memcpy(ji->i_inline_ea, ealist, size); 2141da177e4SLinus Torvalds ea->flag = DXD_INLINE; 2151da177e4SLinus Torvalds ji->mode2 &= ~INLINEEA; 2161da177e4SLinus Torvalds } else { 2171da177e4SLinus Torvalds ea->flag = 0; 2181da177e4SLinus Torvalds DXDsize(ea, 0); 2191da177e4SLinus Torvalds DXDlength(ea, 0); 2201da177e4SLinus Torvalds DXDaddress(ea, 0); 2211da177e4SLinus Torvalds 2221da177e4SLinus Torvalds /* Free up INLINE area */ 2231da177e4SLinus Torvalds if (ji->ea.flag & DXD_INLINE) 2241da177e4SLinus Torvalds ji->mode2 |= INLINEEA; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds return 0; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds /* 2311da177e4SLinus Torvalds * NAME: ea_write 2321da177e4SLinus Torvalds * 2331da177e4SLinus Torvalds * FUNCTION: Write an EA for an inode 2341da177e4SLinus Torvalds * 2351da177e4SLinus Torvalds * PRE CONDITIONS: EA has been verified 2361da177e4SLinus Torvalds * 2371da177e4SLinus Torvalds * PARAMETERS: 2381da177e4SLinus Torvalds * ip - Inode pointer 2391da177e4SLinus Torvalds * ealist - EA list pointer 2401da177e4SLinus Torvalds * size - size of ealist in bytes 2411da177e4SLinus Torvalds * ea - dxd_t structure to be filled in appropriately with where the 2421da177e4SLinus Torvalds * EA was copied 2431da177e4SLinus Torvalds * 2441da177e4SLinus Torvalds * NOTES: Will write EA inline if able to, otherwise allocates blocks for an 2451da177e4SLinus Torvalds * extent and synchronously writes it to those blocks. 2461da177e4SLinus Torvalds * 2471da177e4SLinus Torvalds * RETURNS: 0 for success; Anything else indicates failure 2481da177e4SLinus Torvalds */ 2491da177e4SLinus Torvalds static int ea_write(struct inode *ip, struct jfs_ea_list *ealist, int size, 2501da177e4SLinus Torvalds dxd_t * ea) 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds struct super_block *sb = ip->i_sb; 2531da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(ip); 2541da177e4SLinus Torvalds struct jfs_sb_info *sbi = JFS_SBI(sb); 2551da177e4SLinus Torvalds int nblocks; 2561da177e4SLinus Torvalds s64 blkno; 2571da177e4SLinus Torvalds int rc = 0, i; 2581da177e4SLinus Torvalds char *cp; 2591da177e4SLinus Torvalds s32 nbytes, nb; 2601da177e4SLinus Torvalds s32 bytes_to_write; 2611da177e4SLinus Torvalds struct metapage *mp; 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* 2641da177e4SLinus Torvalds * Quick check to see if this is an in-linable EA. Short EAs 2651da177e4SLinus Torvalds * and empty EAs are all in-linable, provided the space exists. 2661da177e4SLinus Torvalds */ 2671da177e4SLinus Torvalds if (!ealist || size <= sizeof (ji->i_inline_ea)) { 2681da177e4SLinus Torvalds if (!ea_write_inline(ip, ealist, size, ea)) 2691da177e4SLinus Torvalds return 0; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds /* figure out how many blocks we need */ 2731da177e4SLinus Torvalds nblocks = (size + (sb->s_blocksize - 1)) >> sb->s_blocksize_bits; 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds /* Allocate new blocks to quota. */ 2761da177e4SLinus Torvalds if (DQUOT_ALLOC_BLOCK(ip, nblocks)) { 2771da177e4SLinus Torvalds return -EDQUOT; 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds rc = dbAlloc(ip, INOHINT(ip), nblocks, &blkno); 2811da177e4SLinus Torvalds if (rc) { 2821da177e4SLinus Torvalds /*Rollback quota allocation. */ 2831da177e4SLinus Torvalds DQUOT_FREE_BLOCK(ip, nblocks); 2841da177e4SLinus Torvalds return rc; 2851da177e4SLinus Torvalds } 2861da177e4SLinus Torvalds 2871da177e4SLinus Torvalds /* 2881da177e4SLinus Torvalds * Now have nblocks worth of storage to stuff into the FEALIST. 2891da177e4SLinus Torvalds * loop over the FEALIST copying data into the buffer one page at 2901da177e4SLinus Torvalds * a time. 2911da177e4SLinus Torvalds */ 2921da177e4SLinus Torvalds cp = (char *) ealist; 2931da177e4SLinus Torvalds nbytes = size; 2941da177e4SLinus Torvalds for (i = 0; i < nblocks; i += sbi->nbperpage) { 2951da177e4SLinus Torvalds /* 2961da177e4SLinus Torvalds * Determine how many bytes for this request, and round up to 2971da177e4SLinus Torvalds * the nearest aggregate block size 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds nb = min(PSIZE, nbytes); 3001da177e4SLinus Torvalds bytes_to_write = 3011da177e4SLinus Torvalds ((((nb + sb->s_blocksize - 1)) >> sb->s_blocksize_bits)) 3021da177e4SLinus Torvalds << sb->s_blocksize_bits; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds if (!(mp = get_metapage(ip, blkno + i, bytes_to_write, 1))) { 3051da177e4SLinus Torvalds rc = -EIO; 3061da177e4SLinus Torvalds goto failed; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds memcpy(mp->data, cp, nb); 3101da177e4SLinus Torvalds 3111da177e4SLinus Torvalds /* 3121da177e4SLinus Torvalds * We really need a way to propagate errors for 3131da177e4SLinus Torvalds * forced writes like this one. --hch 3141da177e4SLinus Torvalds * 3151da177e4SLinus Torvalds * (__write_metapage => release_metapage => flush_metapage) 3161da177e4SLinus Torvalds */ 3171da177e4SLinus Torvalds #ifdef _JFS_FIXME 3181da177e4SLinus Torvalds if ((rc = flush_metapage(mp))) { 3191da177e4SLinus Torvalds /* 3201da177e4SLinus Torvalds * the write failed -- this means that the buffer 3211da177e4SLinus Torvalds * is still assigned and the blocks are not being 3221da177e4SLinus Torvalds * used. this seems like the best error recovery 3231da177e4SLinus Torvalds * we can get ... 3241da177e4SLinus Torvalds */ 3251da177e4SLinus Torvalds goto failed; 3261da177e4SLinus Torvalds } 3271da177e4SLinus Torvalds #else 3281da177e4SLinus Torvalds flush_metapage(mp); 3291da177e4SLinus Torvalds #endif 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds cp += PSIZE; 3321da177e4SLinus Torvalds nbytes -= nb; 3331da177e4SLinus Torvalds } 3341da177e4SLinus Torvalds 3351da177e4SLinus Torvalds ea->flag = DXD_EXTENT; 3361da177e4SLinus Torvalds DXDsize(ea, le32_to_cpu(ealist->size)); 3371da177e4SLinus Torvalds DXDlength(ea, nblocks); 3381da177e4SLinus Torvalds DXDaddress(ea, blkno); 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds /* Free up INLINE area */ 3411da177e4SLinus Torvalds if (ji->ea.flag & DXD_INLINE) 3421da177e4SLinus Torvalds ji->mode2 |= INLINEEA; 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds return 0; 3451da177e4SLinus Torvalds 3461da177e4SLinus Torvalds failed: 3471da177e4SLinus Torvalds /* Rollback quota allocation. */ 3481da177e4SLinus Torvalds DQUOT_FREE_BLOCK(ip, nblocks); 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds dbFree(ip, blkno, nblocks); 3511da177e4SLinus Torvalds return rc; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds 3541da177e4SLinus Torvalds /* 3551da177e4SLinus Torvalds * NAME: ea_read_inline 3561da177e4SLinus Torvalds * 3571da177e4SLinus Torvalds * FUNCTION: Read an inlined EA into user's buffer 3581da177e4SLinus Torvalds * 3591da177e4SLinus Torvalds * PARAMETERS: 3601da177e4SLinus Torvalds * ip - Inode pointer 3611da177e4SLinus Torvalds * ealist - Pointer to buffer to fill in with EA 3621da177e4SLinus Torvalds * 3631da177e4SLinus Torvalds * RETURNS: 0 3641da177e4SLinus Torvalds */ 3651da177e4SLinus Torvalds static int ea_read_inline(struct inode *ip, struct jfs_ea_list *ealist) 3661da177e4SLinus Torvalds { 3671da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(ip); 3681da177e4SLinus Torvalds int ea_size = sizeDXD(&ji->ea); 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds if (ea_size == 0) { 3711da177e4SLinus Torvalds ealist->size = 0; 3721da177e4SLinus Torvalds return 0; 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds /* Sanity Check */ 3761da177e4SLinus Torvalds if ((sizeDXD(&ji->ea) > sizeof (ji->i_inline_ea))) 3771da177e4SLinus Torvalds return -EIO; 3781da177e4SLinus Torvalds if (le32_to_cpu(((struct jfs_ea_list *) &ji->i_inline_ea)->size) 3791da177e4SLinus Torvalds != ea_size) 3801da177e4SLinus Torvalds return -EIO; 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds memcpy(ealist, ji->i_inline_ea, ea_size); 3831da177e4SLinus Torvalds return 0; 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds /* 3871da177e4SLinus Torvalds * NAME: ea_read 3881da177e4SLinus Torvalds * 3891da177e4SLinus Torvalds * FUNCTION: copy EA data into user's buffer 3901da177e4SLinus Torvalds * 3911da177e4SLinus Torvalds * PARAMETERS: 3921da177e4SLinus Torvalds * ip - Inode pointer 3931da177e4SLinus Torvalds * ealist - Pointer to buffer to fill in with EA 3941da177e4SLinus Torvalds * 3951da177e4SLinus Torvalds * NOTES: If EA is inline calls ea_read_inline() to copy EA. 3961da177e4SLinus Torvalds * 3971da177e4SLinus Torvalds * RETURNS: 0 for success; other indicates failure 3981da177e4SLinus Torvalds */ 3991da177e4SLinus Torvalds static int ea_read(struct inode *ip, struct jfs_ea_list *ealist) 4001da177e4SLinus Torvalds { 4011da177e4SLinus Torvalds struct super_block *sb = ip->i_sb; 4021da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(ip); 4031da177e4SLinus Torvalds struct jfs_sb_info *sbi = JFS_SBI(sb); 4041da177e4SLinus Torvalds int nblocks; 4051da177e4SLinus Torvalds s64 blkno; 4061da177e4SLinus Torvalds char *cp = (char *) ealist; 4071da177e4SLinus Torvalds int i; 4081da177e4SLinus Torvalds int nbytes, nb; 4091da177e4SLinus Torvalds s32 bytes_to_read; 4101da177e4SLinus Torvalds struct metapage *mp; 4111da177e4SLinus Torvalds 4121da177e4SLinus Torvalds /* quick check for in-line EA */ 4131da177e4SLinus Torvalds if (ji->ea.flag & DXD_INLINE) 4141da177e4SLinus Torvalds return ea_read_inline(ip, ealist); 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds nbytes = sizeDXD(&ji->ea); 4171da177e4SLinus Torvalds if (!nbytes) { 4181da177e4SLinus Torvalds jfs_error(sb, "ea_read: nbytes is 0"); 4191da177e4SLinus Torvalds return -EIO; 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds /* 4231da177e4SLinus Torvalds * Figure out how many blocks were allocated when this EA list was 4241da177e4SLinus Torvalds * originally written to disk. 4251da177e4SLinus Torvalds */ 4261da177e4SLinus Torvalds nblocks = lengthDXD(&ji->ea) << sbi->l2nbperpage; 4271da177e4SLinus Torvalds blkno = addressDXD(&ji->ea) << sbi->l2nbperpage; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* 4301da177e4SLinus Torvalds * I have found the disk blocks which were originally used to store 4311da177e4SLinus Torvalds * the FEALIST. now i loop over each contiguous block copying the 4321da177e4SLinus Torvalds * data into the buffer. 4331da177e4SLinus Torvalds */ 4341da177e4SLinus Torvalds for (i = 0; i < nblocks; i += sbi->nbperpage) { 4351da177e4SLinus Torvalds /* 4361da177e4SLinus Torvalds * Determine how many bytes for this request, and round up to 4371da177e4SLinus Torvalds * the nearest aggregate block size 4381da177e4SLinus Torvalds */ 4391da177e4SLinus Torvalds nb = min(PSIZE, nbytes); 4401da177e4SLinus Torvalds bytes_to_read = 4411da177e4SLinus Torvalds ((((nb + sb->s_blocksize - 1)) >> sb->s_blocksize_bits)) 4421da177e4SLinus Torvalds << sb->s_blocksize_bits; 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds if (!(mp = read_metapage(ip, blkno + i, bytes_to_read, 1))) 4451da177e4SLinus Torvalds return -EIO; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds memcpy(cp, mp->data, nb); 4481da177e4SLinus Torvalds release_metapage(mp); 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds cp += PSIZE; 4511da177e4SLinus Torvalds nbytes -= nb; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds return 0; 4551da177e4SLinus Torvalds } 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds /* 4581da177e4SLinus Torvalds * NAME: ea_get 4591da177e4SLinus Torvalds * 4601da177e4SLinus Torvalds * FUNCTION: Returns buffer containing existing extended attributes. 4611da177e4SLinus Torvalds * The size of the buffer will be the larger of the existing 4621da177e4SLinus Torvalds * attributes size, or min_size. 4631da177e4SLinus Torvalds * 4641da177e4SLinus Torvalds * The buffer, which may be inlined in the inode or in the 4651da177e4SLinus Torvalds * page cache must be release by calling ea_release or ea_put 4661da177e4SLinus Torvalds * 4671da177e4SLinus Torvalds * PARAMETERS: 4681da177e4SLinus Torvalds * inode - Inode pointer 4691da177e4SLinus Torvalds * ea_buf - Structure to be populated with ealist and its metadata 4701da177e4SLinus Torvalds * min_size- minimum size of buffer to be returned 4711da177e4SLinus Torvalds * 4721da177e4SLinus Torvalds * RETURNS: 0 for success; Other indicates failure 4731da177e4SLinus Torvalds */ 4741da177e4SLinus Torvalds static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size) 4751da177e4SLinus Torvalds { 4761da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(inode); 4771da177e4SLinus Torvalds struct super_block *sb = inode->i_sb; 4781da177e4SLinus Torvalds int size; 4791da177e4SLinus Torvalds int ea_size = sizeDXD(&ji->ea); 4801da177e4SLinus Torvalds int blocks_needed, current_blocks; 4811da177e4SLinus Torvalds s64 blkno; 4821da177e4SLinus Torvalds int rc; 4831da177e4SLinus Torvalds int quota_allocation = 0; 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /* When fsck.jfs clears a bad ea, it doesn't clear the size */ 4861da177e4SLinus Torvalds if (ji->ea.flag == 0) 4871da177e4SLinus Torvalds ea_size = 0; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds if (ea_size == 0) { 4901da177e4SLinus Torvalds if (min_size == 0) { 4911da177e4SLinus Torvalds ea_buf->flag = 0; 4921da177e4SLinus Torvalds ea_buf->max_size = 0; 4931da177e4SLinus Torvalds ea_buf->xattr = NULL; 4941da177e4SLinus Torvalds return 0; 4951da177e4SLinus Torvalds } 4961da177e4SLinus Torvalds if ((min_size <= sizeof (ji->i_inline_ea)) && 4971da177e4SLinus Torvalds (ji->mode2 & INLINEEA)) { 4981da177e4SLinus Torvalds ea_buf->flag = EA_INLINE | EA_NEW; 4991da177e4SLinus Torvalds ea_buf->max_size = sizeof (ji->i_inline_ea); 5001da177e4SLinus Torvalds ea_buf->xattr = (struct jfs_ea_list *) ji->i_inline_ea; 5011da177e4SLinus Torvalds DXDlength(&ea_buf->new_ea, 0); 5021da177e4SLinus Torvalds DXDaddress(&ea_buf->new_ea, 0); 5031da177e4SLinus Torvalds ea_buf->new_ea.flag = DXD_INLINE; 5041da177e4SLinus Torvalds DXDsize(&ea_buf->new_ea, min_size); 5051da177e4SLinus Torvalds return 0; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds current_blocks = 0; 5081da177e4SLinus Torvalds } else if (ji->ea.flag & DXD_INLINE) { 5091da177e4SLinus Torvalds if (min_size <= sizeof (ji->i_inline_ea)) { 5101da177e4SLinus Torvalds ea_buf->flag = EA_INLINE; 5111da177e4SLinus Torvalds ea_buf->max_size = sizeof (ji->i_inline_ea); 5121da177e4SLinus Torvalds ea_buf->xattr = (struct jfs_ea_list *) ji->i_inline_ea; 5131da177e4SLinus Torvalds goto size_check; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds current_blocks = 0; 5161da177e4SLinus Torvalds } else { 5171da177e4SLinus Torvalds if (!(ji->ea.flag & DXD_EXTENT)) { 5181da177e4SLinus Torvalds jfs_error(sb, "ea_get: invalid ea.flag)"); 5191da177e4SLinus Torvalds return -EIO; 5201da177e4SLinus Torvalds } 5211da177e4SLinus Torvalds current_blocks = (ea_size + sb->s_blocksize - 1) >> 5221da177e4SLinus Torvalds sb->s_blocksize_bits; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds size = max(min_size, ea_size); 5251da177e4SLinus Torvalds 5261da177e4SLinus Torvalds if (size > PSIZE) { 5271da177e4SLinus Torvalds /* 5281da177e4SLinus Torvalds * To keep the rest of the code simple. Allocate a 5291da177e4SLinus Torvalds * contiguous buffer to work with 5301da177e4SLinus Torvalds */ 5311da177e4SLinus Torvalds ea_buf->xattr = kmalloc(size, GFP_KERNEL); 5321da177e4SLinus Torvalds if (ea_buf->xattr == NULL) 5331da177e4SLinus Torvalds return -ENOMEM; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds ea_buf->flag = EA_MALLOC; 5361da177e4SLinus Torvalds ea_buf->max_size = (size + sb->s_blocksize - 1) & 5371da177e4SLinus Torvalds ~(sb->s_blocksize - 1); 5381da177e4SLinus Torvalds 5391da177e4SLinus Torvalds if (ea_size == 0) 5401da177e4SLinus Torvalds return 0; 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds if ((rc = ea_read(inode, ea_buf->xattr))) { 5431da177e4SLinus Torvalds kfree(ea_buf->xattr); 5441da177e4SLinus Torvalds ea_buf->xattr = NULL; 5451da177e4SLinus Torvalds return rc; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds goto size_check; 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds blocks_needed = (min_size + sb->s_blocksize - 1) >> 5501da177e4SLinus Torvalds sb->s_blocksize_bits; 5511da177e4SLinus Torvalds 5521da177e4SLinus Torvalds if (blocks_needed > current_blocks) { 5531da177e4SLinus Torvalds /* Allocate new blocks to quota. */ 5541da177e4SLinus Torvalds if (DQUOT_ALLOC_BLOCK(inode, blocks_needed)) 5551da177e4SLinus Torvalds return -EDQUOT; 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds quota_allocation = blocks_needed; 5581da177e4SLinus Torvalds 5591da177e4SLinus Torvalds rc = dbAlloc(inode, INOHINT(inode), (s64) blocks_needed, 5601da177e4SLinus Torvalds &blkno); 5611da177e4SLinus Torvalds if (rc) 5621da177e4SLinus Torvalds goto clean_up; 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds DXDlength(&ea_buf->new_ea, blocks_needed); 5651da177e4SLinus Torvalds DXDaddress(&ea_buf->new_ea, blkno); 5661da177e4SLinus Torvalds ea_buf->new_ea.flag = DXD_EXTENT; 5671da177e4SLinus Torvalds DXDsize(&ea_buf->new_ea, min_size); 5681da177e4SLinus Torvalds 5691da177e4SLinus Torvalds ea_buf->flag = EA_EXTENT | EA_NEW; 5701da177e4SLinus Torvalds 5711da177e4SLinus Torvalds ea_buf->mp = get_metapage(inode, blkno, 5721da177e4SLinus Torvalds blocks_needed << sb->s_blocksize_bits, 5731da177e4SLinus Torvalds 1); 5741da177e4SLinus Torvalds if (ea_buf->mp == NULL) { 5751da177e4SLinus Torvalds dbFree(inode, blkno, (s64) blocks_needed); 5761da177e4SLinus Torvalds rc = -EIO; 5771da177e4SLinus Torvalds goto clean_up; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds ea_buf->xattr = ea_buf->mp->data; 5801da177e4SLinus Torvalds ea_buf->max_size = (min_size + sb->s_blocksize - 1) & 5811da177e4SLinus Torvalds ~(sb->s_blocksize - 1); 5821da177e4SLinus Torvalds if (ea_size == 0) 5831da177e4SLinus Torvalds return 0; 5841da177e4SLinus Torvalds if ((rc = ea_read(inode, ea_buf->xattr))) { 5851da177e4SLinus Torvalds discard_metapage(ea_buf->mp); 5861da177e4SLinus Torvalds dbFree(inode, blkno, (s64) blocks_needed); 5871da177e4SLinus Torvalds goto clean_up; 5881da177e4SLinus Torvalds } 5891da177e4SLinus Torvalds goto size_check; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds ea_buf->flag = EA_EXTENT; 5921da177e4SLinus Torvalds ea_buf->mp = read_metapage(inode, addressDXD(&ji->ea), 5931da177e4SLinus Torvalds lengthDXD(&ji->ea) << sb->s_blocksize_bits, 5941da177e4SLinus Torvalds 1); 5951da177e4SLinus Torvalds if (ea_buf->mp == NULL) { 5961da177e4SLinus Torvalds rc = -EIO; 5971da177e4SLinus Torvalds goto clean_up; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds ea_buf->xattr = ea_buf->mp->data; 6001da177e4SLinus Torvalds ea_buf->max_size = (ea_size + sb->s_blocksize - 1) & 6011da177e4SLinus Torvalds ~(sb->s_blocksize - 1); 6021da177e4SLinus Torvalds 6031da177e4SLinus Torvalds size_check: 6041da177e4SLinus Torvalds if (EALIST_SIZE(ea_buf->xattr) != ea_size) { 6051da177e4SLinus Torvalds printk(KERN_ERR "ea_get: invalid extended attribute\n"); 6061da177e4SLinus Torvalds dump_mem("xattr", ea_buf->xattr, ea_size); 6071da177e4SLinus Torvalds ea_release(inode, ea_buf); 6081da177e4SLinus Torvalds rc = -EIO; 6091da177e4SLinus Torvalds goto clean_up; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 6121da177e4SLinus Torvalds return ea_size; 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds clean_up: 6151da177e4SLinus Torvalds /* Rollback quota allocation */ 6161da177e4SLinus Torvalds if (quota_allocation) 6171da177e4SLinus Torvalds DQUOT_FREE_BLOCK(inode, quota_allocation); 6181da177e4SLinus Torvalds 6191da177e4SLinus Torvalds return (rc); 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds static void ea_release(struct inode *inode, struct ea_buffer *ea_buf) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds if (ea_buf->flag & EA_MALLOC) 6251da177e4SLinus Torvalds kfree(ea_buf->xattr); 6261da177e4SLinus Torvalds else if (ea_buf->flag & EA_EXTENT) { 6271da177e4SLinus Torvalds assert(ea_buf->mp); 6281da177e4SLinus Torvalds release_metapage(ea_buf->mp); 6291da177e4SLinus Torvalds 6301da177e4SLinus Torvalds if (ea_buf->flag & EA_NEW) 6311da177e4SLinus Torvalds dbFree(inode, addressDXD(&ea_buf->new_ea), 6321da177e4SLinus Torvalds lengthDXD(&ea_buf->new_ea)); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds } 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds static int ea_put(struct inode *inode, struct ea_buffer *ea_buf, int new_size) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds struct jfs_inode_info *ji = JFS_IP(inode); 6391da177e4SLinus Torvalds unsigned long old_blocks, new_blocks; 6401da177e4SLinus Torvalds int rc = 0; 6411da177e4SLinus Torvalds tid_t tid; 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds if (new_size == 0) { 6441da177e4SLinus Torvalds ea_release(inode, ea_buf); 6451da177e4SLinus Torvalds ea_buf = NULL; 6461da177e4SLinus Torvalds } else if (ea_buf->flag & EA_INLINE) { 6471da177e4SLinus Torvalds assert(new_size <= sizeof (ji->i_inline_ea)); 6481da177e4SLinus Torvalds ji->mode2 &= ~INLINEEA; 6491da177e4SLinus Torvalds ea_buf->new_ea.flag = DXD_INLINE; 6501da177e4SLinus Torvalds DXDsize(&ea_buf->new_ea, new_size); 6511da177e4SLinus Torvalds DXDaddress(&ea_buf->new_ea, 0); 6521da177e4SLinus Torvalds DXDlength(&ea_buf->new_ea, 0); 6531da177e4SLinus Torvalds } else if (ea_buf->flag & EA_MALLOC) { 6541da177e4SLinus Torvalds rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea); 6551da177e4SLinus Torvalds kfree(ea_buf->xattr); 6561da177e4SLinus Torvalds } else if (ea_buf->flag & EA_NEW) { 6571da177e4SLinus Torvalds /* We have already allocated a new dxd */ 6581da177e4SLinus Torvalds flush_metapage(ea_buf->mp); 6591da177e4SLinus Torvalds } else { 6601da177e4SLinus Torvalds /* ->xattr must point to original ea's metapage */ 6611da177e4SLinus Torvalds rc = ea_write(inode, ea_buf->xattr, new_size, &ea_buf->new_ea); 6621da177e4SLinus Torvalds discard_metapage(ea_buf->mp); 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds if (rc) 6651da177e4SLinus Torvalds return rc; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds tid = txBegin(inode->i_sb, 0); 6681da177e4SLinus Torvalds down(&ji->commit_sem); 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds old_blocks = new_blocks = 0; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds if (ji->ea.flag & DXD_EXTENT) { 6731da177e4SLinus Torvalds invalidate_dxd_metapages(inode, ji->ea); 6741da177e4SLinus Torvalds old_blocks = lengthDXD(&ji->ea); 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds if (ea_buf) { 6781da177e4SLinus Torvalds txEA(tid, inode, &ji->ea, &ea_buf->new_ea); 6791da177e4SLinus Torvalds if (ea_buf->new_ea.flag & DXD_EXTENT) { 6801da177e4SLinus Torvalds new_blocks = lengthDXD(&ea_buf->new_ea); 6811da177e4SLinus Torvalds if (ji->ea.flag & DXD_INLINE) 6821da177e4SLinus Torvalds ji->mode2 |= INLINEEA; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds ji->ea = ea_buf->new_ea; 6851da177e4SLinus Torvalds } else { 6861da177e4SLinus Torvalds txEA(tid, inode, &ji->ea, NULL); 6871da177e4SLinus Torvalds if (ji->ea.flag & DXD_INLINE) 6881da177e4SLinus Torvalds ji->mode2 |= INLINEEA; 6891da177e4SLinus Torvalds ji->ea.flag = 0; 6901da177e4SLinus Torvalds ji->ea.size = 0; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds 6931da177e4SLinus Torvalds /* If old blocks exist, they must be removed from quota allocation. */ 6941da177e4SLinus Torvalds if (old_blocks) 6951da177e4SLinus Torvalds DQUOT_FREE_BLOCK(inode, old_blocks); 6961da177e4SLinus Torvalds 6971da177e4SLinus Torvalds inode->i_ctime = CURRENT_TIME; 6981da177e4SLinus Torvalds rc = txCommit(tid, 1, &inode, 0); 6991da177e4SLinus Torvalds txEnd(tid); 7001da177e4SLinus Torvalds up(&ji->commit_sem); 7011da177e4SLinus Torvalds 7021da177e4SLinus Torvalds return rc; 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds /* 7061da177e4SLinus Torvalds * can_set_system_xattr 7071da177e4SLinus Torvalds * 7081da177e4SLinus Torvalds * This code is specific to the system.* namespace. It contains policy 7091da177e4SLinus Torvalds * which doesn't belong in the main xattr codepath. 7101da177e4SLinus Torvalds */ 7111da177e4SLinus Torvalds static int can_set_system_xattr(struct inode *inode, const char *name, 7121da177e4SLinus Torvalds const void *value, size_t value_len) 7131da177e4SLinus Torvalds { 7141da177e4SLinus Torvalds #ifdef CONFIG_JFS_POSIX_ACL 7151da177e4SLinus Torvalds struct posix_acl *acl; 7161da177e4SLinus Torvalds int rc; 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds if ((current->fsuid != inode->i_uid) && !capable(CAP_FOWNER)) 7191da177e4SLinus Torvalds return -EPERM; 7201da177e4SLinus Torvalds 7211da177e4SLinus Torvalds /* 7229a59f452SChristoph Hellwig * POSIX_ACL_XATTR_ACCESS is tied to i_mode 7231da177e4SLinus Torvalds */ 7249a59f452SChristoph Hellwig if (strcmp(name, POSIX_ACL_XATTR_ACCESS) == 0) { 7251da177e4SLinus Torvalds acl = posix_acl_from_xattr(value, value_len); 7261da177e4SLinus Torvalds if (IS_ERR(acl)) { 7271da177e4SLinus Torvalds rc = PTR_ERR(acl); 7281da177e4SLinus Torvalds printk(KERN_ERR "posix_acl_from_xattr returned %d\n", 7291da177e4SLinus Torvalds rc); 7301da177e4SLinus Torvalds return rc; 7311da177e4SLinus Torvalds } 7321da177e4SLinus Torvalds if (acl) { 7331da177e4SLinus Torvalds mode_t mode = inode->i_mode; 7341da177e4SLinus Torvalds rc = posix_acl_equiv_mode(acl, &mode); 7351da177e4SLinus Torvalds posix_acl_release(acl); 7361da177e4SLinus Torvalds if (rc < 0) { 7371da177e4SLinus Torvalds printk(KERN_ERR 7381da177e4SLinus Torvalds "posix_acl_equiv_mode returned %d\n", 7391da177e4SLinus Torvalds rc); 7401da177e4SLinus Torvalds return rc; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds inode->i_mode = mode; 7431da177e4SLinus Torvalds mark_inode_dirty(inode); 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds /* 7461da177e4SLinus Torvalds * We're changing the ACL. Get rid of the cached one 7471da177e4SLinus Torvalds */ 7481da177e4SLinus Torvalds acl =JFS_IP(inode)->i_acl; 7491da177e4SLinus Torvalds if (acl != JFS_ACL_NOT_CACHED) 7501da177e4SLinus Torvalds posix_acl_release(acl); 7511da177e4SLinus Torvalds JFS_IP(inode)->i_acl = JFS_ACL_NOT_CACHED; 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds return 0; 7549a59f452SChristoph Hellwig } else if (strcmp(name, POSIX_ACL_XATTR_DEFAULT) == 0) { 7551da177e4SLinus Torvalds acl = posix_acl_from_xattr(value, value_len); 7561da177e4SLinus Torvalds if (IS_ERR(acl)) { 7571da177e4SLinus Torvalds rc = PTR_ERR(acl); 7581da177e4SLinus Torvalds printk(KERN_ERR "posix_acl_from_xattr returned %d\n", 7591da177e4SLinus Torvalds rc); 7601da177e4SLinus Torvalds return rc; 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds posix_acl_release(acl); 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds /* 7651da177e4SLinus Torvalds * We're changing the default ACL. Get rid of the cached one 7661da177e4SLinus Torvalds */ 7671da177e4SLinus Torvalds acl =JFS_IP(inode)->i_default_acl; 7681da177e4SLinus Torvalds if (acl && (acl != JFS_ACL_NOT_CACHED)) 7691da177e4SLinus Torvalds posix_acl_release(acl); 7701da177e4SLinus Torvalds JFS_IP(inode)->i_default_acl = JFS_ACL_NOT_CACHED; 7711da177e4SLinus Torvalds 7721da177e4SLinus Torvalds return 0; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds #endif /* CONFIG_JFS_POSIX_ACL */ 7751da177e4SLinus Torvalds return -EOPNOTSUPP; 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds static int can_set_xattr(struct inode *inode, const char *name, 7791da177e4SLinus Torvalds const void *value, size_t value_len) 7801da177e4SLinus Torvalds { 7811da177e4SLinus Torvalds if (IS_RDONLY(inode)) 7821da177e4SLinus Torvalds return -EROFS; 7831da177e4SLinus Torvalds 7841da177e4SLinus Torvalds if (IS_IMMUTABLE(inode) || IS_APPEND(inode) || S_ISLNK(inode->i_mode)) 7851da177e4SLinus Torvalds return -EPERM; 7861da177e4SLinus Torvalds 7871da177e4SLinus Torvalds if(strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) == 0) 7881da177e4SLinus Torvalds /* 7891da177e4SLinus Torvalds * "system.*" 7901da177e4SLinus Torvalds */ 7911da177e4SLinus Torvalds return can_set_system_xattr(inode, name, value, value_len); 7921da177e4SLinus Torvalds 7931da177e4SLinus Torvalds if(strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) != 0) 7941da177e4SLinus Torvalds return (capable(CAP_SYS_ADMIN) ? 0 : -EPERM); 7951da177e4SLinus Torvalds 7961da177e4SLinus Torvalds #ifdef CONFIG_JFS_SECURITY 7971da177e4SLinus Torvalds if (strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) 7981da177e4SLinus Torvalds != 0) 7991da177e4SLinus Torvalds return 0; /* Leave it to the security module */ 8001da177e4SLinus Torvalds #endif 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds if((strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) != 0) && 8031da177e4SLinus Torvalds (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) != 0)) 8041da177e4SLinus Torvalds return -EOPNOTSUPP; 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds if (!S_ISREG(inode->i_mode) && 8071da177e4SLinus Torvalds (!S_ISDIR(inode->i_mode) || inode->i_mode &S_ISVTX)) 8081da177e4SLinus Torvalds return -EPERM; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds return permission(inode, MAY_WRITE, NULL); 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds int __jfs_setxattr(struct inode *inode, const char *name, const void *value, 8141da177e4SLinus Torvalds size_t value_len, int flags) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds struct jfs_ea_list *ealist; 8171da177e4SLinus Torvalds struct jfs_ea *ea, *old_ea = NULL, *next_ea = NULL; 8181da177e4SLinus Torvalds struct ea_buffer ea_buf; 8191da177e4SLinus Torvalds int old_ea_size = 0; 8201da177e4SLinus Torvalds int xattr_size; 8211da177e4SLinus Torvalds int new_size; 8221da177e4SLinus Torvalds int namelen = strlen(name); 8231da177e4SLinus Torvalds char *os2name = NULL; 8241da177e4SLinus Torvalds int found = 0; 8251da177e4SLinus Torvalds int rc; 8261da177e4SLinus Torvalds int length; 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds if ((rc = can_set_xattr(inode, name, value, value_len))) 8291da177e4SLinus Torvalds return rc; 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { 8321da177e4SLinus Torvalds os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1, 8331da177e4SLinus Torvalds GFP_KERNEL); 8341da177e4SLinus Torvalds if (!os2name) 8351da177e4SLinus Torvalds return -ENOMEM; 8361da177e4SLinus Torvalds strcpy(os2name, name + XATTR_OS2_PREFIX_LEN); 8371da177e4SLinus Torvalds name = os2name; 8381da177e4SLinus Torvalds namelen -= XATTR_OS2_PREFIX_LEN; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds 8411da177e4SLinus Torvalds down_write(&JFS_IP(inode)->xattr_sem); 8421da177e4SLinus Torvalds 8431da177e4SLinus Torvalds xattr_size = ea_get(inode, &ea_buf, 0); 8441da177e4SLinus Torvalds if (xattr_size < 0) { 8451da177e4SLinus Torvalds rc = xattr_size; 8461da177e4SLinus Torvalds goto out; 8471da177e4SLinus Torvalds } 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds again: 8501da177e4SLinus Torvalds ealist = (struct jfs_ea_list *) ea_buf.xattr; 8511da177e4SLinus Torvalds new_size = sizeof (struct jfs_ea_list); 8521da177e4SLinus Torvalds 8531da177e4SLinus Torvalds if (xattr_size) { 8541da177e4SLinus Torvalds for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); 8551da177e4SLinus Torvalds ea = NEXT_EA(ea)) { 8561da177e4SLinus Torvalds if ((namelen == ea->namelen) && 8571da177e4SLinus Torvalds (memcmp(name, ea->name, namelen) == 0)) { 8581da177e4SLinus Torvalds found = 1; 8591da177e4SLinus Torvalds if (flags & XATTR_CREATE) { 8601da177e4SLinus Torvalds rc = -EEXIST; 8611da177e4SLinus Torvalds goto release; 8621da177e4SLinus Torvalds } 8631da177e4SLinus Torvalds old_ea = ea; 8641da177e4SLinus Torvalds old_ea_size = EA_SIZE(ea); 8651da177e4SLinus Torvalds next_ea = NEXT_EA(ea); 8661da177e4SLinus Torvalds } else 8671da177e4SLinus Torvalds new_size += EA_SIZE(ea); 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds } 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds if (!found) { 8721da177e4SLinus Torvalds if (flags & XATTR_REPLACE) { 8731da177e4SLinus Torvalds rc = -ENODATA; 8741da177e4SLinus Torvalds goto release; 8751da177e4SLinus Torvalds } 8761da177e4SLinus Torvalds if (value == NULL) { 8771da177e4SLinus Torvalds rc = 0; 8781da177e4SLinus Torvalds goto release; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds } 8811da177e4SLinus Torvalds if (value) 8821da177e4SLinus Torvalds new_size += sizeof (struct jfs_ea) + namelen + 1 + value_len; 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds if (new_size > ea_buf.max_size) { 8851da177e4SLinus Torvalds /* 8861da177e4SLinus Torvalds * We need to allocate more space for merged ea list. 8871da177e4SLinus Torvalds * We should only have loop to again: once. 8881da177e4SLinus Torvalds */ 8891da177e4SLinus Torvalds ea_release(inode, &ea_buf); 8901da177e4SLinus Torvalds xattr_size = ea_get(inode, &ea_buf, new_size); 8911da177e4SLinus Torvalds if (xattr_size < 0) { 8921da177e4SLinus Torvalds rc = xattr_size; 8931da177e4SLinus Torvalds goto out; 8941da177e4SLinus Torvalds } 8951da177e4SLinus Torvalds goto again; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds /* Remove old ea of the same name */ 8991da177e4SLinus Torvalds if (found) { 9001da177e4SLinus Torvalds /* number of bytes following target EA */ 9011da177e4SLinus Torvalds length = (char *) END_EALIST(ealist) - (char *) next_ea; 9021da177e4SLinus Torvalds if (length > 0) 9031da177e4SLinus Torvalds memmove(old_ea, next_ea, length); 9041da177e4SLinus Torvalds xattr_size -= old_ea_size; 9051da177e4SLinus Torvalds } 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds /* Add new entry to the end */ 9081da177e4SLinus Torvalds if (value) { 9091da177e4SLinus Torvalds if (xattr_size == 0) 9101da177e4SLinus Torvalds /* Completely new ea list */ 9111da177e4SLinus Torvalds xattr_size = sizeof (struct jfs_ea_list); 9121da177e4SLinus Torvalds 9131da177e4SLinus Torvalds ea = (struct jfs_ea *) ((char *) ealist + xattr_size); 9141da177e4SLinus Torvalds ea->flag = 0; 9151da177e4SLinus Torvalds ea->namelen = namelen; 9161da177e4SLinus Torvalds ea->valuelen = (cpu_to_le16(value_len)); 9171da177e4SLinus Torvalds memcpy(ea->name, name, namelen); 9181da177e4SLinus Torvalds ea->name[namelen] = 0; 9191da177e4SLinus Torvalds if (value_len) 9201da177e4SLinus Torvalds memcpy(&ea->name[namelen + 1], value, value_len); 9211da177e4SLinus Torvalds xattr_size += EA_SIZE(ea); 9221da177e4SLinus Torvalds } 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds /* DEBUG - If we did this right, these number match */ 9251da177e4SLinus Torvalds if (xattr_size != new_size) { 9261da177e4SLinus Torvalds printk(KERN_ERR 9271da177e4SLinus Torvalds "jfs_xsetattr: xattr_size = %d, new_size = %d\n", 9281da177e4SLinus Torvalds xattr_size, new_size); 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds rc = -EINVAL; 9311da177e4SLinus Torvalds goto release; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds /* 9351da177e4SLinus Torvalds * If we're left with an empty list, there's no ea 9361da177e4SLinus Torvalds */ 9371da177e4SLinus Torvalds if (new_size == sizeof (struct jfs_ea_list)) 9381da177e4SLinus Torvalds new_size = 0; 9391da177e4SLinus Torvalds 9401da177e4SLinus Torvalds ealist->size = cpu_to_le32(new_size); 9411da177e4SLinus Torvalds 9421da177e4SLinus Torvalds rc = ea_put(inode, &ea_buf, new_size); 9431da177e4SLinus Torvalds 9441da177e4SLinus Torvalds goto out; 9451da177e4SLinus Torvalds release: 9461da177e4SLinus Torvalds ea_release(inode, &ea_buf); 9471da177e4SLinus Torvalds out: 9481da177e4SLinus Torvalds up_write(&JFS_IP(inode)->xattr_sem); 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds kfree(os2name); 9511da177e4SLinus Torvalds 9521da177e4SLinus Torvalds return rc; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds int jfs_setxattr(struct dentry *dentry, const char *name, const void *value, 9561da177e4SLinus Torvalds size_t value_len, int flags) 9571da177e4SLinus Torvalds { 9581da177e4SLinus Torvalds if (value == NULL) { /* empty EA, do not remove */ 9591da177e4SLinus Torvalds value = ""; 9601da177e4SLinus Torvalds value_len = 0; 9611da177e4SLinus Torvalds } 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds return __jfs_setxattr(dentry->d_inode, name, value, value_len, flags); 9641da177e4SLinus Torvalds } 9651da177e4SLinus Torvalds 9661da177e4SLinus Torvalds static int can_get_xattr(struct inode *inode, const char *name) 9671da177e4SLinus Torvalds { 9681da177e4SLinus Torvalds #ifdef CONFIG_JFS_SECURITY 9691da177e4SLinus Torvalds if(strncmp(name, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN) == 0) 9701da177e4SLinus Torvalds return 0; 9711da177e4SLinus Torvalds #endif 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds if(strncmp(name, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN) == 0) 9741da177e4SLinus Torvalds return (capable(CAP_SYS_ADMIN) ? 0 : -EPERM); 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds if(strncmp(name, XATTR_SYSTEM_PREFIX, XATTR_SYSTEM_PREFIX_LEN) == 0) 9771da177e4SLinus Torvalds return 0; 9781da177e4SLinus Torvalds 9791da177e4SLinus Torvalds return permission(inode, MAY_READ, NULL); 9801da177e4SLinus Torvalds } 9811da177e4SLinus Torvalds 9821da177e4SLinus Torvalds ssize_t __jfs_getxattr(struct inode *inode, const char *name, void *data, 9831da177e4SLinus Torvalds size_t buf_size) 9841da177e4SLinus Torvalds { 9851da177e4SLinus Torvalds struct jfs_ea_list *ealist; 9861da177e4SLinus Torvalds struct jfs_ea *ea; 9871da177e4SLinus Torvalds struct ea_buffer ea_buf; 9881da177e4SLinus Torvalds int xattr_size; 9891da177e4SLinus Torvalds ssize_t size; 9901da177e4SLinus Torvalds int namelen = strlen(name); 9911da177e4SLinus Torvalds char *os2name = NULL; 9921da177e4SLinus Torvalds int rc; 9931da177e4SLinus Torvalds char *value; 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds if ((rc = can_get_xattr(inode, name))) 9961da177e4SLinus Torvalds return rc; 9971da177e4SLinus Torvalds 9981da177e4SLinus Torvalds if (strncmp(name, XATTR_OS2_PREFIX, XATTR_OS2_PREFIX_LEN) == 0) { 9991da177e4SLinus Torvalds os2name = kmalloc(namelen - XATTR_OS2_PREFIX_LEN + 1, 10001da177e4SLinus Torvalds GFP_KERNEL); 10011da177e4SLinus Torvalds if (!os2name) 10021da177e4SLinus Torvalds return -ENOMEM; 10031da177e4SLinus Torvalds strcpy(os2name, name + XATTR_OS2_PREFIX_LEN); 10041da177e4SLinus Torvalds name = os2name; 10051da177e4SLinus Torvalds namelen -= XATTR_OS2_PREFIX_LEN; 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds 10081da177e4SLinus Torvalds down_read(&JFS_IP(inode)->xattr_sem); 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds xattr_size = ea_get(inode, &ea_buf, 0); 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds if (xattr_size < 0) { 10131da177e4SLinus Torvalds size = xattr_size; 10141da177e4SLinus Torvalds goto out; 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 10171da177e4SLinus Torvalds if (xattr_size == 0) 10181da177e4SLinus Torvalds goto not_found; 10191da177e4SLinus Torvalds 10201da177e4SLinus Torvalds ealist = (struct jfs_ea_list *) ea_buf.xattr; 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds /* Find the named attribute */ 10231da177e4SLinus Torvalds for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) 10241da177e4SLinus Torvalds if ((namelen == ea->namelen) && 10251da177e4SLinus Torvalds memcmp(name, ea->name, namelen) == 0) { 10261da177e4SLinus Torvalds /* Found it */ 10271da177e4SLinus Torvalds size = le16_to_cpu(ea->valuelen); 10281da177e4SLinus Torvalds if (!data) 10291da177e4SLinus Torvalds goto release; 10301da177e4SLinus Torvalds else if (size > buf_size) { 10311da177e4SLinus Torvalds size = -ERANGE; 10321da177e4SLinus Torvalds goto release; 10331da177e4SLinus Torvalds } 10341da177e4SLinus Torvalds value = ((char *) &ea->name) + ea->namelen + 1; 10351da177e4SLinus Torvalds memcpy(data, value, size); 10361da177e4SLinus Torvalds goto release; 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds not_found: 10391da177e4SLinus Torvalds size = -ENODATA; 10401da177e4SLinus Torvalds release: 10411da177e4SLinus Torvalds ea_release(inode, &ea_buf); 10421da177e4SLinus Torvalds out: 10431da177e4SLinus Torvalds up_read(&JFS_IP(inode)->xattr_sem); 10441da177e4SLinus Torvalds 10451da177e4SLinus Torvalds kfree(os2name); 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds return size; 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds ssize_t jfs_getxattr(struct dentry *dentry, const char *name, void *data, 10511da177e4SLinus Torvalds size_t buf_size) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds int err; 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds err = __jfs_getxattr(dentry->d_inode, name, data, buf_size); 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds return err; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds /* 10611da177e4SLinus Torvalds * No special permissions are needed to list attributes except for trusted.* 10621da177e4SLinus Torvalds */ 10631da177e4SLinus Torvalds static inline int can_list(struct jfs_ea *ea) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds return (strncmp(ea->name, XATTR_TRUSTED_PREFIX, 10661da177e4SLinus Torvalds XATTR_TRUSTED_PREFIX_LEN) || 10671da177e4SLinus Torvalds capable(CAP_SYS_ADMIN)); 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds ssize_t jfs_listxattr(struct dentry * dentry, char *data, size_t buf_size) 10711da177e4SLinus Torvalds { 10721da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 10731da177e4SLinus Torvalds char *buffer; 10741da177e4SLinus Torvalds ssize_t size = 0; 10751da177e4SLinus Torvalds int xattr_size; 10761da177e4SLinus Torvalds struct jfs_ea_list *ealist; 10771da177e4SLinus Torvalds struct jfs_ea *ea; 10781da177e4SLinus Torvalds struct ea_buffer ea_buf; 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds down_read(&JFS_IP(inode)->xattr_sem); 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds xattr_size = ea_get(inode, &ea_buf, 0); 10831da177e4SLinus Torvalds if (xattr_size < 0) { 10841da177e4SLinus Torvalds size = xattr_size; 10851da177e4SLinus Torvalds goto out; 10861da177e4SLinus Torvalds } 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds if (xattr_size == 0) 10891da177e4SLinus Torvalds goto release; 10901da177e4SLinus Torvalds 10911da177e4SLinus Torvalds ealist = (struct jfs_ea_list *) ea_buf.xattr; 10921da177e4SLinus Torvalds 10931da177e4SLinus Torvalds /* compute required size of list */ 10941da177e4SLinus Torvalds for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) { 10951da177e4SLinus Torvalds if (can_list(ea)) 10961da177e4SLinus Torvalds size += name_size(ea) + 1; 10971da177e4SLinus Torvalds } 10981da177e4SLinus Torvalds 10991da177e4SLinus Torvalds if (!data) 11001da177e4SLinus Torvalds goto release; 11011da177e4SLinus Torvalds 11021da177e4SLinus Torvalds if (size > buf_size) { 11031da177e4SLinus Torvalds size = -ERANGE; 11041da177e4SLinus Torvalds goto release; 11051da177e4SLinus Torvalds } 11061da177e4SLinus Torvalds 11071da177e4SLinus Torvalds /* Copy attribute names to buffer */ 11081da177e4SLinus Torvalds buffer = data; 11091da177e4SLinus Torvalds for (ea = FIRST_EA(ealist); ea < END_EALIST(ealist); ea = NEXT_EA(ea)) { 11101da177e4SLinus Torvalds if (can_list(ea)) { 11111da177e4SLinus Torvalds int namelen = copy_name(buffer, ea); 11121da177e4SLinus Torvalds buffer += namelen + 1; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds release: 11171da177e4SLinus Torvalds ea_release(inode, &ea_buf); 11181da177e4SLinus Torvalds out: 11191da177e4SLinus Torvalds up_read(&JFS_IP(inode)->xattr_sem); 11201da177e4SLinus Torvalds return size; 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds int jfs_removexattr(struct dentry *dentry, const char *name) 11241da177e4SLinus Torvalds { 11251da177e4SLinus Torvalds return __jfs_setxattr(dentry->d_inode, name, NULL, 0, XATTR_REPLACE); 11261da177e4SLinus Torvalds } 1127